1fa9e4066Sahrens /* 2fa9e4066Sahrens * CDDL HEADER START 3fa9e4066Sahrens * 4fa9e4066Sahrens * The contents of this file are subject to the terms of the 5736b9155Smarks * Common Development and Distribution License (the "License"). 6736b9155Smarks * You may not use this file except in compliance with the License. 7fa9e4066Sahrens * 8fa9e4066Sahrens * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9fa9e4066Sahrens * or http://www.opensolaris.org/os/licensing. 10fa9e4066Sahrens * See the License for the specific language governing permissions 11fa9e4066Sahrens * and limitations under the License. 12fa9e4066Sahrens * 13fa9e4066Sahrens * When distributing Covered Code, include this CDDL HEADER in each 14fa9e4066Sahrens * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15fa9e4066Sahrens * If applicable, add the following below this CDDL HEADER, with the 16fa9e4066Sahrens * fields enclosed by brackets "[]" replaced with your own identifying 17fa9e4066Sahrens * information: Portions Copyright [yyyy] [name of copyright owner] 18fa9e4066Sahrens * 19fa9e4066Sahrens * CDDL HEADER END 20fa9e4066Sahrens */ 21fa9e4066Sahrens /* 22*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Copyright 2010 Sun Microsystems, Inc. All rights reserved. 23fa9e4066Sahrens * Use is subject to license terms. 24fa9e4066Sahrens */ 25fa9e4066Sahrens 2675c76197Speteh /* Portions Copyright 2007 Jeremy Teo */ 2775c76197Speteh 28fa9e4066Sahrens #include <sys/types.h> 29fa9e4066Sahrens #include <sys/param.h> 30fa9e4066Sahrens #include <sys/time.h> 31fa9e4066Sahrens #include <sys/systm.h> 32fa9e4066Sahrens #include <sys/sysmacros.h> 33fa9e4066Sahrens #include <sys/resource.h> 34fa9e4066Sahrens #include <sys/vfs.h> 35aa59c4cbSrsb #include <sys/vfs_opreg.h> 36fa9e4066Sahrens #include <sys/vnode.h> 37fa9e4066Sahrens #include <sys/file.h> 38fa9e4066Sahrens #include <sys/stat.h> 39fa9e4066Sahrens #include <sys/kmem.h> 40fa9e4066Sahrens #include <sys/taskq.h> 41fa9e4066Sahrens #include <sys/uio.h> 42fa9e4066Sahrens #include <sys/vmsystm.h> 43fa9e4066Sahrens #include <sys/atomic.h> 4444eda4d7Smaybee #include <sys/vm.h> 45fa9e4066Sahrens #include <vm/seg_vn.h> 46fa9e4066Sahrens #include <vm/pvn.h> 47fa9e4066Sahrens #include <vm/as.h> 480fab61baSJonathan W Adams #include <vm/kpm.h> 490fab61baSJonathan W Adams #include <vm/seg_kpm.h> 50fa9e4066Sahrens #include <sys/mman.h> 51fa9e4066Sahrens #include <sys/pathname.h> 52fa9e4066Sahrens #include <sys/cmn_err.h> 53fa9e4066Sahrens #include <sys/errno.h> 54fa9e4066Sahrens #include <sys/unistd.h> 55fa9e4066Sahrens #include <sys/zfs_dir.h> 56fa9e4066Sahrens #include <sys/zfs_acl.h> 57fa9e4066Sahrens #include <sys/zfs_ioctl.h> 58fa9e4066Sahrens #include <sys/fs/zfs.h> 59fa9e4066Sahrens #include <sys/dmu.h> 60fa9e4066Sahrens #include <sys/spa.h> 61fa9e4066Sahrens #include <sys/txg.h> 62fa9e4066Sahrens #include <sys/dbuf.h> 63fa9e4066Sahrens #include <sys/zap.h> 64fa9e4066Sahrens #include <sys/dirent.h> 65fa9e4066Sahrens #include <sys/policy.h> 66fa9e4066Sahrens #include <sys/sunddi.h> 67fa9e4066Sahrens #include <sys/filio.h> 68c1ce5987SMark Shellenbaum #include <sys/sid.h> 69fa9e4066Sahrens #include "fs/fs_subr.h" 70fa9e4066Sahrens #include <sys/zfs_ctldir.h> 71da6c28aaSamw #include <sys/zfs_fuid.h> 72033f9833Sek #include <sys/dnlc.h> 73104e2ed7Sperrin #include <sys/zfs_rlock.h> 74da6c28aaSamw #include <sys/extdirent.h> 75da6c28aaSamw #include <sys/kidmap.h> 7667dbe2beSCasper H.S. Dik #include <sys/cred.h> 77b38f0970Sck #include <sys/attr.h> 78fa9e4066Sahrens 79fa9e4066Sahrens /* 80fa9e4066Sahrens * Programming rules. 81fa9e4066Sahrens * 82fa9e4066Sahrens * Each vnode op performs some logical unit of work. To do this, the ZPL must 83fa9e4066Sahrens * properly lock its in-core state, create a DMU transaction, do the work, 84fa9e4066Sahrens * record this work in the intent log (ZIL), commit the DMU transaction, 85da6c28aaSamw * and wait for the intent log to commit if it is a synchronous operation. 86da6c28aaSamw * Moreover, the vnode ops must work in both normal and log replay context. 87fa9e4066Sahrens * The ordering of events is important to avoid deadlocks and references 88fa9e4066Sahrens * to freed memory. The example below illustrates the following Big Rules: 89fa9e4066Sahrens * 90fa9e4066Sahrens * (1) A check must be made in each zfs thread for a mounted file system. 913cb34c60Sahrens * This is done avoiding races using ZFS_ENTER(zfsvfs). 923cb34c60Sahrens * A ZFS_EXIT(zfsvfs) is needed before all returns. Any znodes 933cb34c60Sahrens * must be checked with ZFS_VERIFY_ZP(zp). Both of these macros 943cb34c60Sahrens * can return EIO from the calling function. 95fa9e4066Sahrens * 96fa9e4066Sahrens * (2) VN_RELE() should always be the last thing except for zil_commit() 97b19a79ecSperrin * (if necessary) and ZFS_EXIT(). This is for 3 reasons: 98fa9e4066Sahrens * First, if it's the last reference, the vnode/znode 99fa9e4066Sahrens * can be freed, so the zp may point to freed memory. Second, the last 100fa9e4066Sahrens * reference will call zfs_zinactive(), which may induce a lot of work -- 101104e2ed7Sperrin * pushing cached pages (which acquires range locks) and syncing out 102fa9e4066Sahrens * cached atime changes. Third, zfs_zinactive() may require a new tx, 103fa9e4066Sahrens * which could deadlock the system if you were already holding one. 1049d3574bfSNeil Perrin * If you must call VN_RELE() within a tx then use VN_RELE_ASYNC(). 105fa9e4066Sahrens * 1067885c754Sperrin * (3) All range locks must be grabbed before calling dmu_tx_assign(), 1077885c754Sperrin * as they can span dmu_tx_assign() calls. 1087885c754Sperrin * 1091209a471SNeil Perrin * (4) Always pass TXG_NOWAIT as the second argument to dmu_tx_assign(). 110fa9e4066Sahrens * This is critical because we don't want to block while holding locks. 111fa9e4066Sahrens * Note, in particular, that if a lock is sometimes acquired before 112fa9e4066Sahrens * the tx assigns, and sometimes after (e.g. z_lock), then failing to 113fa9e4066Sahrens * use a non-blocking assign can deadlock the system. The scenario: 114fa9e4066Sahrens * 115fa9e4066Sahrens * Thread A has grabbed a lock before calling dmu_tx_assign(). 116fa9e4066Sahrens * Thread B is in an already-assigned tx, and blocks for this lock. 117fa9e4066Sahrens * Thread A calls dmu_tx_assign(TXG_WAIT) and blocks in txg_wait_open() 118fa9e4066Sahrens * forever, because the previous txg can't quiesce until B's tx commits. 119fa9e4066Sahrens * 120fa9e4066Sahrens * If dmu_tx_assign() returns ERESTART and zfsvfs->z_assign is TXG_NOWAIT, 1218a2f1b91Sahrens * then drop all locks, call dmu_tx_wait(), and try again. 122fa9e4066Sahrens * 1237885c754Sperrin * (5) If the operation succeeded, generate the intent log entry for it 124fa9e4066Sahrens * before dropping locks. This ensures that the ordering of events 125fa9e4066Sahrens * in the intent log matches the order in which they actually occurred. 1261209a471SNeil Perrin * During ZIL replay the zfs_log_* functions will update the sequence 1271209a471SNeil Perrin * number to indicate the zil transaction has replayed. 128fa9e4066Sahrens * 1297885c754Sperrin * (6) At the end of each vnode op, the DMU tx must always commit, 130fa9e4066Sahrens * regardless of whether there were any errors. 131fa9e4066Sahrens * 132b19a79ecSperrin * (7) After dropping all locks, invoke zil_commit(zilog, seq, foid) 133fa9e4066Sahrens * to ensure that synchronous semantics are provided when necessary. 134fa9e4066Sahrens * 135fa9e4066Sahrens * In general, this is how things should be ordered in each vnode op: 136fa9e4066Sahrens * 137fa9e4066Sahrens * ZFS_ENTER(zfsvfs); // exit if unmounted 138fa9e4066Sahrens * top: 139fa9e4066Sahrens * zfs_dirent_lock(&dl, ...) // lock directory entry (may VN_HOLD()) 140fa9e4066Sahrens * rw_enter(...); // grab any other locks you need 141fa9e4066Sahrens * tx = dmu_tx_create(...); // get DMU tx 142fa9e4066Sahrens * dmu_tx_hold_*(); // hold each object you might modify 1431209a471SNeil Perrin * error = dmu_tx_assign(tx, TXG_NOWAIT); // try to assign 144fa9e4066Sahrens * if (error) { 145fa9e4066Sahrens * rw_exit(...); // drop locks 146fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 147fa9e4066Sahrens * VN_RELE(...); // release held vnodes 1481209a471SNeil Perrin * if (error == ERESTART) { 1498a2f1b91Sahrens * dmu_tx_wait(tx); 1508a2f1b91Sahrens * dmu_tx_abort(tx); 151fa9e4066Sahrens * goto top; 152fa9e4066Sahrens * } 1538a2f1b91Sahrens * dmu_tx_abort(tx); // abort DMU tx 154fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 155fa9e4066Sahrens * return (error); // really out of space 156fa9e4066Sahrens * } 157fa9e4066Sahrens * error = do_real_work(); // do whatever this VOP does 158fa9e4066Sahrens * if (error == 0) 159b19a79ecSperrin * zfs_log_*(...); // on success, make ZIL entry 160fa9e4066Sahrens * dmu_tx_commit(tx); // commit DMU tx -- error or not 161fa9e4066Sahrens * rw_exit(...); // drop locks 162fa9e4066Sahrens * zfs_dirent_unlock(dl); // unlock directory entry 163fa9e4066Sahrens * VN_RELE(...); // release held vnodes 164b19a79ecSperrin * zil_commit(zilog, seq, foid); // synchronous when necessary 165fa9e4066Sahrens * ZFS_EXIT(zfsvfs); // finished in zfs 166fa9e4066Sahrens * return (error); // done, report error 167fa9e4066Sahrens */ 1683cb34c60Sahrens 169fa9e4066Sahrens /* ARGSUSED */ 170fa9e4066Sahrens static int 171da6c28aaSamw zfs_open(vnode_t **vpp, int flag, cred_t *cr, caller_context_t *ct) 172fa9e4066Sahrens { 17367bd71c6Sperrin znode_t *zp = VTOZ(*vpp); 174b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 175b614fdaaSMark Shellenbaum 176b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 177b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 17867bd71c6Sperrin 179da6c28aaSamw if ((flag & FWRITE) && (zp->z_phys->zp_flags & ZFS_APPENDONLY) && 180da6c28aaSamw ((flag & FAPPEND) == 0)) { 181b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 182da6c28aaSamw return (EPERM); 183da6c28aaSamw } 184da6c28aaSamw 185da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 186da6c28aaSamw ZTOV(zp)->v_type == VREG && 187da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 188b614fdaaSMark Shellenbaum zp->z_phys->zp_size > 0) { 189b614fdaaSMark Shellenbaum if (fs_vscan(*vpp, cr, 0) != 0) { 190b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 191da6c28aaSamw return (EACCES); 192b614fdaaSMark Shellenbaum } 193b614fdaaSMark Shellenbaum } 194da6c28aaSamw 19567bd71c6Sperrin /* Keep a count of the synchronous opens in the znode */ 19667bd71c6Sperrin if (flag & (FSYNC | FDSYNC)) 19767bd71c6Sperrin atomic_inc_32(&zp->z_sync_cnt); 198da6c28aaSamw 199b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 200fa9e4066Sahrens return (0); 201fa9e4066Sahrens } 202fa9e4066Sahrens 203fa9e4066Sahrens /* ARGSUSED */ 204fa9e4066Sahrens static int 205da6c28aaSamw zfs_close(vnode_t *vp, int flag, int count, offset_t offset, cred_t *cr, 206da6c28aaSamw caller_context_t *ct) 207fa9e4066Sahrens { 20867bd71c6Sperrin znode_t *zp = VTOZ(vp); 209b614fdaaSMark Shellenbaum zfsvfs_t *zfsvfs = zp->z_zfsvfs; 210b614fdaaSMark Shellenbaum 211ee8143cbSChris Kirby /* 212ee8143cbSChris Kirby * Clean up any locks held by this process on the vp. 213ee8143cbSChris Kirby */ 214ee8143cbSChris Kirby cleanlocks(vp, ddi_get_pid(), 0); 215ee8143cbSChris Kirby cleanshares(vp, ddi_get_pid()); 216ee8143cbSChris Kirby 217b614fdaaSMark Shellenbaum ZFS_ENTER(zfsvfs); 218b614fdaaSMark Shellenbaum ZFS_VERIFY_ZP(zp); 21967bd71c6Sperrin 22067bd71c6Sperrin /* Decrement the synchronous opens in the znode */ 221ecb72030Sperrin if ((flag & (FSYNC | FDSYNC)) && (count == 1)) 22267bd71c6Sperrin atomic_dec_32(&zp->z_sync_cnt); 22367bd71c6Sperrin 224da6c28aaSamw if (!zfs_has_ctldir(zp) && zp->z_zfsvfs->z_vscan && 225da6c28aaSamw ZTOV(zp)->v_type == VREG && 226da6c28aaSamw !(zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) && 227da6c28aaSamw zp->z_phys->zp_size > 0) 228da6c28aaSamw VERIFY(fs_vscan(vp, cr, 1) == 0); 229da6c28aaSamw 230b614fdaaSMark Shellenbaum ZFS_EXIT(zfsvfs); 231fa9e4066Sahrens return (0); 232fa9e4066Sahrens } 233fa9e4066Sahrens 234fa9e4066Sahrens /* 235fa9e4066Sahrens * Lseek support for finding holes (cmd == _FIO_SEEK_HOLE) and 236fa9e4066Sahrens * data (cmd == _FIO_SEEK_DATA). "off" is an in/out parameter. 237fa9e4066Sahrens */ 238fa9e4066Sahrens static int 239fa9e4066Sahrens zfs_holey(vnode_t *vp, int cmd, offset_t *off) 240fa9e4066Sahrens { 241fa9e4066Sahrens znode_t *zp = VTOZ(vp); 242fa9e4066Sahrens uint64_t noff = (uint64_t)*off; /* new offset */ 243fa9e4066Sahrens uint64_t file_sz; 244fa9e4066Sahrens int error; 245fa9e4066Sahrens boolean_t hole; 246fa9e4066Sahrens 247fa9e4066Sahrens file_sz = zp->z_phys->zp_size; 248fa9e4066Sahrens if (noff >= file_sz) { 249fa9e4066Sahrens return (ENXIO); 250fa9e4066Sahrens } 251fa9e4066Sahrens 252fa9e4066Sahrens if (cmd == _FIO_SEEK_HOLE) 253fa9e4066Sahrens hole = B_TRUE; 254fa9e4066Sahrens else 255fa9e4066Sahrens hole = B_FALSE; 256fa9e4066Sahrens 257fa9e4066Sahrens error = dmu_offset_next(zp->z_zfsvfs->z_os, zp->z_id, hole, &noff); 258fa9e4066Sahrens 259fa9e4066Sahrens /* end of file? */ 260fa9e4066Sahrens if ((error == ESRCH) || (noff > file_sz)) { 261fa9e4066Sahrens /* 262fa9e4066Sahrens * Handle the virtual hole at the end of file. 263fa9e4066Sahrens */ 264fa9e4066Sahrens if (hole) { 265fa9e4066Sahrens *off = file_sz; 266fa9e4066Sahrens return (0); 267fa9e4066Sahrens } 268fa9e4066Sahrens return (ENXIO); 269fa9e4066Sahrens } 270fa9e4066Sahrens 271fa9e4066Sahrens if (noff < *off) 272fa9e4066Sahrens return (error); 273fa9e4066Sahrens *off = noff; 274fa9e4066Sahrens return (error); 275fa9e4066Sahrens } 276fa9e4066Sahrens 277fa9e4066Sahrens /* ARGSUSED */ 278fa9e4066Sahrens static int 279fa9e4066Sahrens zfs_ioctl(vnode_t *vp, int com, intptr_t data, int flag, cred_t *cred, 280da6c28aaSamw int *rvalp, caller_context_t *ct) 281fa9e4066Sahrens { 282fa9e4066Sahrens offset_t off; 283fa9e4066Sahrens int error; 284fa9e4066Sahrens zfsvfs_t *zfsvfs; 285f18faf3fSek znode_t *zp; 286fa9e4066Sahrens 287fa9e4066Sahrens switch (com) { 288ecb72030Sperrin case _FIOFFS: 289fa9e4066Sahrens return (zfs_sync(vp->v_vfsp, 0, cred)); 290fa9e4066Sahrens 291ea8dc4b6Seschrock /* 292ea8dc4b6Seschrock * The following two ioctls are used by bfu. Faking out, 293ea8dc4b6Seschrock * necessary to avoid bfu errors. 294ea8dc4b6Seschrock */ 295ecb72030Sperrin case _FIOGDIO: 296ecb72030Sperrin case _FIOSDIO: 297ea8dc4b6Seschrock return (0); 298ea8dc4b6Seschrock 299ecb72030Sperrin case _FIO_SEEK_DATA: 300ecb72030Sperrin case _FIO_SEEK_HOLE: 301fa9e4066Sahrens if (ddi_copyin((void *)data, &off, sizeof (off), flag)) 302fa9e4066Sahrens return (EFAULT); 303fa9e4066Sahrens 304f18faf3fSek zp = VTOZ(vp); 305f18faf3fSek zfsvfs = zp->z_zfsvfs; 3063cb34c60Sahrens ZFS_ENTER(zfsvfs); 3073cb34c60Sahrens ZFS_VERIFY_ZP(zp); 308fa9e4066Sahrens 309fa9e4066Sahrens /* offset parameter is in/out */ 310fa9e4066Sahrens error = zfs_holey(vp, com, &off); 311fa9e4066Sahrens ZFS_EXIT(zfsvfs); 312fa9e4066Sahrens if (error) 313fa9e4066Sahrens return (error); 314fa9e4066Sahrens if (ddi_copyout(&off, (void *)data, sizeof (off), flag)) 315fa9e4066Sahrens return (EFAULT); 316fa9e4066Sahrens return (0); 317fa9e4066Sahrens } 318fa9e4066Sahrens return (ENOTTY); 319fa9e4066Sahrens } 320fa9e4066Sahrens 3210fab61baSJonathan W Adams /* 3220fab61baSJonathan W Adams * Utility functions to map and unmap a single physical page. These 3230fab61baSJonathan W Adams * are used to manage the mappable copies of ZFS file data, and therefore 3240fab61baSJonathan W Adams * do not update ref/mod bits. 3250fab61baSJonathan W Adams */ 3260fab61baSJonathan W Adams caddr_t 3270fab61baSJonathan W Adams zfs_map_page(page_t *pp, enum seg_rw rw) 3280fab61baSJonathan W Adams { 3290fab61baSJonathan W Adams if (kpm_enable) 3300fab61baSJonathan W Adams return (hat_kpm_mapin(pp, 0)); 3310fab61baSJonathan W Adams ASSERT(rw == S_READ || rw == S_WRITE); 3320fab61baSJonathan W Adams return (ppmapin(pp, PROT_READ | ((rw == S_WRITE) ? PROT_WRITE : 0), 3330fab61baSJonathan W Adams (caddr_t)-1)); 3340fab61baSJonathan W Adams } 3350fab61baSJonathan W Adams 3360fab61baSJonathan W Adams void 3370fab61baSJonathan W Adams zfs_unmap_page(page_t *pp, caddr_t addr) 3380fab61baSJonathan W Adams { 3390fab61baSJonathan W Adams if (kpm_enable) { 3400fab61baSJonathan W Adams hat_kpm_mapout(pp, 0, addr); 3410fab61baSJonathan W Adams } else { 3420fab61baSJonathan W Adams ppmapout(addr); 3430fab61baSJonathan W Adams } 3440fab61baSJonathan W Adams } 3450fab61baSJonathan W Adams 346fa9e4066Sahrens /* 347fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 348fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 349fa9e4066Sahrens * 350fa9e4066Sahrens * On Write: If we find a memory mapped page, we write to *both* 351fa9e4066Sahrens * the page and the dmu buffer. 352fa9e4066Sahrens */ 353ac05c741SMark Maybee static void 354ac05c741SMark Maybee update_pages(vnode_t *vp, int64_t start, int len, objset_t *os, uint64_t oid) 355fa9e4066Sahrens { 356ac05c741SMark Maybee int64_t off; 357fa9e4066Sahrens 358fa9e4066Sahrens off = start & PAGEOFFSET; 359fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 360fa9e4066Sahrens page_t *pp; 361ac05c741SMark Maybee uint64_t nbytes = MIN(PAGESIZE - off, len); 362fa9e4066Sahrens 363fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 364fa9e4066Sahrens caddr_t va; 365fa9e4066Sahrens 3660fab61baSJonathan W Adams va = zfs_map_page(pp, S_WRITE); 3677bfdf011SNeil Perrin (void) dmu_read(os, oid, start+off, nbytes, va+off, 3687bfdf011SNeil Perrin DMU_READ_PREFETCH); 3690fab61baSJonathan W Adams zfs_unmap_page(pp, va); 370fa9e4066Sahrens page_unlock(pp); 371fa9e4066Sahrens } 372ac05c741SMark Maybee len -= nbytes; 373fa9e4066Sahrens off = 0; 374fa9e4066Sahrens } 375fa9e4066Sahrens } 376fa9e4066Sahrens 377fa9e4066Sahrens /* 378fa9e4066Sahrens * When a file is memory mapped, we must keep the IO data synchronized 379fa9e4066Sahrens * between the DMU cache and the memory mapped pages. What this means: 380fa9e4066Sahrens * 381fa9e4066Sahrens * On Read: We "read" preferentially from memory mapped pages, 382fa9e4066Sahrens * else we default from the dmu buffer. 383fa9e4066Sahrens * 384fa9e4066Sahrens * NOTE: We will always "break up" the IO into PAGESIZE uiomoves when 385fa9e4066Sahrens * the file is memory mapped. 386fa9e4066Sahrens */ 387fa9e4066Sahrens static int 388feb08c6bSbillm mappedread(vnode_t *vp, int nbytes, uio_t *uio) 389fa9e4066Sahrens { 390feb08c6bSbillm znode_t *zp = VTOZ(vp); 391feb08c6bSbillm objset_t *os = zp->z_zfsvfs->z_os; 392feb08c6bSbillm int64_t start, off; 393fa9e4066Sahrens int len = nbytes; 394fa9e4066Sahrens int error = 0; 395fa9e4066Sahrens 396fa9e4066Sahrens start = uio->uio_loffset; 397fa9e4066Sahrens off = start & PAGEOFFSET; 398fa9e4066Sahrens for (start &= PAGEMASK; len > 0; start += PAGESIZE) { 399fa9e4066Sahrens page_t *pp; 400feb08c6bSbillm uint64_t bytes = MIN(PAGESIZE - off, len); 401fa9e4066Sahrens 402fa9e4066Sahrens if (pp = page_lookup(vp, start, SE_SHARED)) { 403fa9e4066Sahrens caddr_t va; 404fa9e4066Sahrens 4050fab61baSJonathan W Adams va = zfs_map_page(pp, S_READ); 406fa9e4066Sahrens error = uiomove(va + off, bytes, UIO_READ, uio); 4070fab61baSJonathan W Adams zfs_unmap_page(pp, va); 408fa9e4066Sahrens page_unlock(pp); 409fa9e4066Sahrens } else { 410feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, bytes); 411fa9e4066Sahrens } 412fa9e4066Sahrens len -= bytes; 413fa9e4066Sahrens off = 0; 414fa9e4066Sahrens if (error) 415fa9e4066Sahrens break; 416fa9e4066Sahrens } 417fa9e4066Sahrens return (error); 418fa9e4066Sahrens } 419fa9e4066Sahrens 420feb08c6bSbillm offset_t zfs_read_chunk_size = 1024 * 1024; /* Tunable */ 421fa9e4066Sahrens 422fa9e4066Sahrens /* 423fa9e4066Sahrens * Read bytes from specified file into supplied buffer. 424fa9e4066Sahrens * 425fa9e4066Sahrens * IN: vp - vnode of file to be read from. 426fa9e4066Sahrens * uio - structure supplying read location, range info, 427fa9e4066Sahrens * and return buffer. 428fa9e4066Sahrens * ioflag - SYNC flags; used to provide FRSYNC semantics. 429fa9e4066Sahrens * cr - credentials of caller. 430da6c28aaSamw * ct - caller context 431fa9e4066Sahrens * 432fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 433fa9e4066Sahrens * 434fa9e4066Sahrens * RETURN: 0 if success 435fa9e4066Sahrens * error code if failure 436fa9e4066Sahrens * 437fa9e4066Sahrens * Side Effects: 438fa9e4066Sahrens * vp - atime updated if byte count > 0 439fa9e4066Sahrens */ 440fa9e4066Sahrens /* ARGSUSED */ 441fa9e4066Sahrens static int 442fa9e4066Sahrens zfs_read(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 443fa9e4066Sahrens { 444fa9e4066Sahrens znode_t *zp = VTOZ(vp); 445fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 446f18faf3fSek objset_t *os; 447feb08c6bSbillm ssize_t n, nbytes; 448feb08c6bSbillm int error; 449104e2ed7Sperrin rl_t *rl; 450*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 451fa9e4066Sahrens 4523cb34c60Sahrens ZFS_ENTER(zfsvfs); 4533cb34c60Sahrens ZFS_VERIFY_ZP(zp); 454f18faf3fSek os = zfsvfs->z_os; 455fa9e4066Sahrens 4560616c50eSmarks if (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED) { 4570616c50eSmarks ZFS_EXIT(zfsvfs); 4580616c50eSmarks return (EACCES); 4590616c50eSmarks } 4600616c50eSmarks 461fa9e4066Sahrens /* 462fa9e4066Sahrens * Validate file offset 463fa9e4066Sahrens */ 464fa9e4066Sahrens if (uio->uio_loffset < (offset_t)0) { 465fa9e4066Sahrens ZFS_EXIT(zfsvfs); 466fa9e4066Sahrens return (EINVAL); 467fa9e4066Sahrens } 468fa9e4066Sahrens 469fa9e4066Sahrens /* 470fa9e4066Sahrens * Fasttrack empty reads 471fa9e4066Sahrens */ 472fa9e4066Sahrens if (uio->uio_resid == 0) { 473fa9e4066Sahrens ZFS_EXIT(zfsvfs); 474fa9e4066Sahrens return (0); 475fa9e4066Sahrens } 476fa9e4066Sahrens 477fa9e4066Sahrens /* 478104e2ed7Sperrin * Check for mandatory locks 479fa9e4066Sahrens */ 480fa9e4066Sahrens if (MANDMODE((mode_t)zp->z_phys->zp_mode)) { 481fa9e4066Sahrens if (error = chklock(vp, FREAD, 482fa9e4066Sahrens uio->uio_loffset, uio->uio_resid, uio->uio_fmode, ct)) { 483fa9e4066Sahrens ZFS_EXIT(zfsvfs); 484fa9e4066Sahrens return (error); 485fa9e4066Sahrens } 486fa9e4066Sahrens } 487fa9e4066Sahrens 488fa9e4066Sahrens /* 489fa9e4066Sahrens * If we're in FRSYNC mode, sync out this znode before reading it. 490fa9e4066Sahrens */ 491b19a79ecSperrin if (ioflag & FRSYNC) 492b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 493fa9e4066Sahrens 494fa9e4066Sahrens /* 495104e2ed7Sperrin * Lock the range against changes. 496fa9e4066Sahrens */ 497104e2ed7Sperrin rl = zfs_range_lock(zp, uio->uio_loffset, uio->uio_resid, RL_READER); 498104e2ed7Sperrin 499fa9e4066Sahrens /* 500fa9e4066Sahrens * If we are reading past end-of-file we can skip 501fa9e4066Sahrens * to the end; but we might still need to set atime. 502fa9e4066Sahrens */ 503fa9e4066Sahrens if (uio->uio_loffset >= zp->z_phys->zp_size) { 504fa9e4066Sahrens error = 0; 505fa9e4066Sahrens goto out; 506fa9e4066Sahrens } 507fa9e4066Sahrens 508feb08c6bSbillm ASSERT(uio->uio_loffset < zp->z_phys->zp_size); 509feb08c6bSbillm n = MIN(uio->uio_resid, zp->z_phys->zp_size - uio->uio_loffset); 510feb08c6bSbillm 511*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((uio->uio_extflg == UIO_XUIO) && 512*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) { 513*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int nblk; 514*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int blksz = zp->z_blksz; 515*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uint64_t offset = uio->uio_loffset; 516*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 517*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 518*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((ISP2(blksz))) { 519*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States nblk = (P2ROUNDUP(offset + n, blksz) - P2ALIGN(offset, 520*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz)) / blksz; 521*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 522*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(offset + n <= blksz); 523*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States nblk = 1; 524*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 525*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio, nblk); 526*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 527*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (vn_has_cached_data(vp)) { 528*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 529*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * For simplicity, we always allocate a full buffer 530*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * even if we only expect to read a portion of a block. 531*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 532*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States while (--nblk >= 0) { 533*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio, 534*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_request_arcbuf(zp->z_dbuf, blksz), 535*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 0, blksz); 536*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 537*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 538*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 539*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 540feb08c6bSbillm while (n > 0) { 541feb08c6bSbillm nbytes = MIN(n, zfs_read_chunk_size - 542feb08c6bSbillm P2PHASE(uio->uio_loffset, zfs_read_chunk_size)); 543fa9e4066Sahrens 544feb08c6bSbillm if (vn_has_cached_data(vp)) 545feb08c6bSbillm error = mappedread(vp, nbytes, uio); 546feb08c6bSbillm else 547feb08c6bSbillm error = dmu_read_uio(os, zp->z_id, uio, nbytes); 548b87f3af3Sperrin if (error) { 549b87f3af3Sperrin /* convert checksum errors into IO errors */ 550b87f3af3Sperrin if (error == ECKSUM) 551b87f3af3Sperrin error = EIO; 552feb08c6bSbillm break; 553b87f3af3Sperrin } 554fa9e4066Sahrens 555feb08c6bSbillm n -= nbytes; 556fa9e4066Sahrens } 557fa9e4066Sahrens out: 558c5c6ffa0Smaybee zfs_range_unlock(rl); 559fa9e4066Sahrens 560fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 561fa9e4066Sahrens ZFS_EXIT(zfsvfs); 562fa9e4066Sahrens return (error); 563fa9e4066Sahrens } 564fa9e4066Sahrens 565fa9e4066Sahrens /* 566fa9e4066Sahrens * Write the bytes to a file. 567fa9e4066Sahrens * 568fa9e4066Sahrens * IN: vp - vnode of file to be written to. 569fa9e4066Sahrens * uio - structure supplying write location, range info, 570fa9e4066Sahrens * and data buffer. 571fa9e4066Sahrens * ioflag - FAPPEND flag set if in append mode. 572fa9e4066Sahrens * cr - credentials of caller. 573da6c28aaSamw * ct - caller context (NFS/CIFS fem monitor only) 574fa9e4066Sahrens * 575fa9e4066Sahrens * OUT: uio - updated offset and range. 576fa9e4066Sahrens * 577fa9e4066Sahrens * RETURN: 0 if success 578fa9e4066Sahrens * error code if failure 579fa9e4066Sahrens * 580fa9e4066Sahrens * Timestamps: 581fa9e4066Sahrens * vp - ctime|mtime updated if byte count > 0 582fa9e4066Sahrens */ 583fa9e4066Sahrens /* ARGSUSED */ 584fa9e4066Sahrens static int 585fa9e4066Sahrens zfs_write(vnode_t *vp, uio_t *uio, int ioflag, cred_t *cr, caller_context_t *ct) 586fa9e4066Sahrens { 587fa9e4066Sahrens znode_t *zp = VTOZ(vp); 588fa9e4066Sahrens rlim64_t limit = uio->uio_llimit; 589fa9e4066Sahrens ssize_t start_resid = uio->uio_resid; 590fa9e4066Sahrens ssize_t tx_bytes; 591fa9e4066Sahrens uint64_t end_size; 592fa9e4066Sahrens dmu_tx_t *tx; 593fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 594f18faf3fSek zilog_t *zilog; 595fa9e4066Sahrens offset_t woff; 596fa9e4066Sahrens ssize_t n, nbytes; 597104e2ed7Sperrin rl_t *rl; 598fa9e4066Sahrens int max_blksz = zfsvfs->z_max_blksz; 599c09193bfSmarks uint64_t pflags; 600104e2ed7Sperrin int error; 6012fdbea25SAleksandr Guzovskiy arc_buf_t *abuf; 602*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iovec_t *aiov; 603*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_t *xuio = NULL; 604*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i_iov = 0; 605*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int iovcnt = uio->uio_iovcnt; 606*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iovec_t *iovp = uio->uio_iov; 607*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int write_eof; 608fa9e4066Sahrens 609fa9e4066Sahrens /* 610fa9e4066Sahrens * Fasttrack empty write 611fa9e4066Sahrens */ 612104e2ed7Sperrin n = start_resid; 613fa9e4066Sahrens if (n == 0) 614fa9e4066Sahrens return (0); 615fa9e4066Sahrens 616104e2ed7Sperrin if (limit == RLIM64_INFINITY || limit > MAXOFFSET_T) 617104e2ed7Sperrin limit = MAXOFFSET_T; 618104e2ed7Sperrin 6193cb34c60Sahrens ZFS_ENTER(zfsvfs); 6203cb34c60Sahrens ZFS_VERIFY_ZP(zp); 621c09193bfSmarks 622c09193bfSmarks /* 623c09193bfSmarks * If immutable or not appending then return EPERM 624c09193bfSmarks */ 625c09193bfSmarks pflags = zp->z_phys->zp_flags; 626c09193bfSmarks if ((pflags & (ZFS_IMMUTABLE | ZFS_READONLY)) || 627c09193bfSmarks ((pflags & ZFS_APPENDONLY) && !(ioflag & FAPPEND) && 628c09193bfSmarks (uio->uio_loffset < zp->z_phys->zp_size))) { 629c09193bfSmarks ZFS_EXIT(zfsvfs); 630c09193bfSmarks return (EPERM); 631c09193bfSmarks } 632c09193bfSmarks 633f18faf3fSek zilog = zfsvfs->z_log; 634fa9e4066Sahrens 63541865f27SWilliam Gorrell /* 63641865f27SWilliam Gorrell * Validate file offset 63741865f27SWilliam Gorrell */ 63841865f27SWilliam Gorrell woff = ioflag & FAPPEND ? zp->z_phys->zp_size : uio->uio_loffset; 63941865f27SWilliam Gorrell if (woff < 0) { 64041865f27SWilliam Gorrell ZFS_EXIT(zfsvfs); 64141865f27SWilliam Gorrell return (EINVAL); 64241865f27SWilliam Gorrell } 64341865f27SWilliam Gorrell 64441865f27SWilliam Gorrell /* 64541865f27SWilliam Gorrell * Check for mandatory locks before calling zfs_range_lock() 64641865f27SWilliam Gorrell * in order to prevent a deadlock with locks set via fcntl(). 64741865f27SWilliam Gorrell */ 64841865f27SWilliam Gorrell if (MANDMODE((mode_t)zp->z_phys->zp_mode) && 64941865f27SWilliam Gorrell (error = chklock(vp, FWRITE, woff, n, uio->uio_fmode, ct)) != 0) { 65041865f27SWilliam Gorrell ZFS_EXIT(zfsvfs); 65141865f27SWilliam Gorrell return (error); 65241865f27SWilliam Gorrell } 65341865f27SWilliam Gorrell 654fa9e4066Sahrens /* 655c5c6ffa0Smaybee * Pre-fault the pages to ensure slow (eg NFS) pages 656104e2ed7Sperrin * don't hold up txg. 657*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Skip this if uio contains loaned arc_buf. 658fa9e4066Sahrens */ 659*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if ((uio->uio_extflg == UIO_XUIO) && 660*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (((xuio_t *)uio)->xu_type == UIOTYPE_ZEROCOPY)) 661*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio = (xuio_t *)uio; 662*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States else 663*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_prefaultpages(n, uio); 664fa9e4066Sahrens 665fa9e4066Sahrens /* 666fa9e4066Sahrens * If in append mode, set the io offset pointer to eof. 667fa9e4066Sahrens */ 668104e2ed7Sperrin if (ioflag & FAPPEND) { 669104e2ed7Sperrin /* 67041865f27SWilliam Gorrell * Obtain an appending range lock to guarantee file append 67141865f27SWilliam Gorrell * semantics. We reset the write offset once we have the lock. 672104e2ed7Sperrin */ 673104e2ed7Sperrin rl = zfs_range_lock(zp, 0, n, RL_APPEND); 67441865f27SWilliam Gorrell woff = rl->r_off; 675104e2ed7Sperrin if (rl->r_len == UINT64_MAX) { 67641865f27SWilliam Gorrell /* 67741865f27SWilliam Gorrell * We overlocked the file because this write will cause 67841865f27SWilliam Gorrell * the file block size to increase. 67941865f27SWilliam Gorrell * Note that zp_size cannot change with this lock held. 68041865f27SWilliam Gorrell */ 68141865f27SWilliam Gorrell woff = zp->z_phys->zp_size; 682104e2ed7Sperrin } 68341865f27SWilliam Gorrell uio->uio_loffset = woff; 684fa9e4066Sahrens } else { 685fa9e4066Sahrens /* 68641865f27SWilliam Gorrell * Note that if the file block size will change as a result of 68741865f27SWilliam Gorrell * this write, then this range lock will lock the entire file 68841865f27SWilliam Gorrell * so that we can re-write the block safely. 689fa9e4066Sahrens */ 690104e2ed7Sperrin rl = zfs_range_lock(zp, woff, n, RL_WRITER); 691fa9e4066Sahrens } 692fa9e4066Sahrens 693fa9e4066Sahrens if (woff >= limit) { 694feb08c6bSbillm zfs_range_unlock(rl); 695feb08c6bSbillm ZFS_EXIT(zfsvfs); 696feb08c6bSbillm return (EFBIG); 697fa9e4066Sahrens } 698fa9e4066Sahrens 699fa9e4066Sahrens if ((woff + n) > limit || woff > (limit - n)) 700fa9e4066Sahrens n = limit - woff; 701fa9e4066Sahrens 702*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* Will this write extend the file length? */ 703*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States write_eof = (woff + n > zp->z_phys->zp_size); 704*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 705feb08c6bSbillm end_size = MAX(zp->z_phys->zp_size, woff + n); 706fa9e4066Sahrens 707104e2ed7Sperrin /* 708feb08c6bSbillm * Write the file in reasonable size chunks. Each chunk is written 709feb08c6bSbillm * in a separate transaction; this keeps the intent log records small 710feb08c6bSbillm * and allows us to do more fine-grained space accounting. 711104e2ed7Sperrin */ 712feb08c6bSbillm while (n > 0) { 7132fdbea25SAleksandr Guzovskiy abuf = NULL; 7142fdbea25SAleksandr Guzovskiy woff = uio->uio_loffset; 7152fdbea25SAleksandr Guzovskiy again: 71614843421SMatthew Ahrens if (zfs_usergroup_overquota(zfsvfs, 71714843421SMatthew Ahrens B_FALSE, zp->z_phys->zp_uid) || 71814843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, 71914843421SMatthew Ahrens B_TRUE, zp->z_phys->zp_gid)) { 7202fdbea25SAleksandr Guzovskiy if (abuf != NULL) 7212fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 72214843421SMatthew Ahrens error = EDQUOT; 72314843421SMatthew Ahrens break; 72414843421SMatthew Ahrens } 7252fdbea25SAleksandr Guzovskiy 726*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio && abuf == NULL) { 727*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(i_iov < iovcnt); 728*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov = &iovp[i_iov]; 729*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_xuio_arcbuf(xuio, i_iov); 730*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_clear(xuio, i_iov); 731*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States DTRACE_PROBE3(zfs_cp_write, int, i_iov, 732*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States iovec_t *, aiov, arc_buf_t *, abuf); 733*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT((aiov->iov_base == abuf->b_data) || 734*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ((char *)aiov->iov_base - (char *)abuf->b_data + 735*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_len == arc_buf_size(abuf))); 736*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States i_iov++; 737*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else if (abuf == NULL && n >= max_blksz && 7382fdbea25SAleksandr Guzovskiy woff >= zp->z_phys->zp_size && 7392fdbea25SAleksandr Guzovskiy P2PHASE(woff, max_blksz) == 0 && 7402fdbea25SAleksandr Guzovskiy zp->z_blksz == max_blksz) { 741*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 742*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * This write covers a full block. "Borrow" a buffer 743*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * from the dmu so that we can fill it before we enter 744*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * a transaction. This avoids the possibility of 745*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * holding up the transaction if the data copy hangs 746*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * up on a pagefault (e.g., from an NFS server mapping). 747*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 7482fdbea25SAleksandr Guzovskiy size_t cbytes; 7492fdbea25SAleksandr Guzovskiy 7502fdbea25SAleksandr Guzovskiy abuf = dmu_request_arcbuf(zp->z_dbuf, max_blksz); 7512fdbea25SAleksandr Guzovskiy ASSERT(abuf != NULL); 7522fdbea25SAleksandr Guzovskiy ASSERT(arc_buf_size(abuf) == max_blksz); 7532fdbea25SAleksandr Guzovskiy if (error = uiocopy(abuf->b_data, max_blksz, 7542fdbea25SAleksandr Guzovskiy UIO_WRITE, uio, &cbytes)) { 7552fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 7562fdbea25SAleksandr Guzovskiy break; 7572fdbea25SAleksandr Guzovskiy } 7582fdbea25SAleksandr Guzovskiy ASSERT(cbytes == max_blksz); 7592fdbea25SAleksandr Guzovskiy } 7602fdbea25SAleksandr Guzovskiy 7612fdbea25SAleksandr Guzovskiy /* 7622fdbea25SAleksandr Guzovskiy * Start a transaction. 7632fdbea25SAleksandr Guzovskiy */ 764feb08c6bSbillm tx = dmu_tx_create(zfsvfs->z_os); 765feb08c6bSbillm dmu_tx_hold_bonus(tx, zp->z_id); 766feb08c6bSbillm dmu_tx_hold_write(tx, zp->z_id, woff, MIN(n, max_blksz)); 7671209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 768feb08c6bSbillm if (error) { 7691209a471SNeil Perrin if (error == ERESTART) { 770feb08c6bSbillm dmu_tx_wait(tx); 771feb08c6bSbillm dmu_tx_abort(tx); 7722fdbea25SAleksandr Guzovskiy goto again; 773feb08c6bSbillm } 774feb08c6bSbillm dmu_tx_abort(tx); 7752fdbea25SAleksandr Guzovskiy if (abuf != NULL) 7762fdbea25SAleksandr Guzovskiy dmu_return_arcbuf(abuf); 777feb08c6bSbillm break; 778feb08c6bSbillm } 779104e2ed7Sperrin 780feb08c6bSbillm /* 781feb08c6bSbillm * If zfs_range_lock() over-locked we grow the blocksize 782feb08c6bSbillm * and then reduce the lock range. This will only happen 783feb08c6bSbillm * on the first iteration since zfs_range_reduce() will 784feb08c6bSbillm * shrink down r_len to the appropriate size. 785feb08c6bSbillm */ 786feb08c6bSbillm if (rl->r_len == UINT64_MAX) { 787feb08c6bSbillm uint64_t new_blksz; 788feb08c6bSbillm 789feb08c6bSbillm if (zp->z_blksz > max_blksz) { 790feb08c6bSbillm ASSERT(!ISP2(zp->z_blksz)); 791feb08c6bSbillm new_blksz = MIN(end_size, SPA_MAXBLOCKSIZE); 792feb08c6bSbillm } else { 793feb08c6bSbillm new_blksz = MIN(end_size, max_blksz); 794feb08c6bSbillm } 795feb08c6bSbillm zfs_grow_blocksize(zp, new_blksz, tx); 796feb08c6bSbillm zfs_range_reduce(rl, woff, n); 797fa9e4066Sahrens } 798fa9e4066Sahrens 799fa9e4066Sahrens /* 800fa9e4066Sahrens * XXX - should we really limit each write to z_max_blksz? 801fa9e4066Sahrens * Perhaps we should use SPA_MAXBLOCKSIZE chunks? 802fa9e4066Sahrens */ 803fa9e4066Sahrens nbytes = MIN(n, max_blksz - P2PHASE(woff, max_blksz)); 804fa9e4066Sahrens 8052fdbea25SAleksandr Guzovskiy if (abuf == NULL) { 8062fdbea25SAleksandr Guzovskiy tx_bytes = uio->uio_resid; 8072fdbea25SAleksandr Guzovskiy error = dmu_write_uio(zfsvfs->z_os, zp->z_id, uio, 8082fdbea25SAleksandr Guzovskiy nbytes, tx); 8092fdbea25SAleksandr Guzovskiy tx_bytes -= uio->uio_resid; 8102fdbea25SAleksandr Guzovskiy } else { 8112fdbea25SAleksandr Guzovskiy tx_bytes = nbytes; 812*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio == NULL || tx_bytes == aiov->iov_len); 813*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 814*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * If this is not a full block write, but we are 815*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * extending the file past EOF and this data starts 816*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * block-aligned, use assign_arcbuf(). Otherwise, 817*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * write via dmu_write(). 818*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 819*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (tx_bytes < max_blksz && (!write_eof || 820*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_base != abuf->b_data)) { 821*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio); 822*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_write(zfsvfs->z_os, zp->z_id, woff, 823*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States aiov->iov_len, aiov->iov_base, tx); 824*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_return_arcbuf(abuf); 825*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States xuio_stat_wbuf_copied(); 826*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 827*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio || tx_bytes == max_blksz); 828*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_assign_arcbuf(zp->z_dbuf, woff, abuf, tx); 829*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 8302fdbea25SAleksandr Guzovskiy ASSERT(tx_bytes <= uio->uio_resid); 8312fdbea25SAleksandr Guzovskiy uioskip(uio, tx_bytes); 8322fdbea25SAleksandr Guzovskiy } 8332fdbea25SAleksandr Guzovskiy if (tx_bytes && vn_has_cached_data(vp)) { 834ac05c741SMark Maybee update_pages(vp, woff, 835ac05c741SMark Maybee tx_bytes, zfsvfs->z_os, zp->z_id); 8362fdbea25SAleksandr Guzovskiy } 837fa9e4066Sahrens 838feb08c6bSbillm /* 839feb08c6bSbillm * If we made no progress, we're done. If we made even 840feb08c6bSbillm * partial progress, update the znode and ZIL accordingly. 841feb08c6bSbillm */ 842feb08c6bSbillm if (tx_bytes == 0) { 843af2c4821Smaybee dmu_tx_commit(tx); 844feb08c6bSbillm ASSERT(error != 0); 845fa9e4066Sahrens break; 846fa9e4066Sahrens } 847fa9e4066Sahrens 848169cdae2Smarks /* 849169cdae2Smarks * Clear Set-UID/Set-GID bits on successful write if not 850169cdae2Smarks * privileged and at least one of the excute bits is set. 851169cdae2Smarks * 852169cdae2Smarks * It would be nice to to this after all writes have 853169cdae2Smarks * been done, but that would still expose the ISUID/ISGID 854169cdae2Smarks * to another app after the partial write is committed. 855da6c28aaSamw * 856da6c28aaSamw * Note: we don't call zfs_fuid_map_id() here because 857da6c28aaSamw * user 0 is not an ephemeral uid. 858169cdae2Smarks */ 859169cdae2Smarks mutex_enter(&zp->z_acl_lock); 860169cdae2Smarks if ((zp->z_phys->zp_mode & (S_IXUSR | (S_IXUSR >> 3) | 861169cdae2Smarks (S_IXUSR >> 6))) != 0 && 862169cdae2Smarks (zp->z_phys->zp_mode & (S_ISUID | S_ISGID)) != 0 && 863169cdae2Smarks secpolicy_vnode_setid_retain(cr, 864169cdae2Smarks (zp->z_phys->zp_mode & S_ISUID) != 0 && 865169cdae2Smarks zp->z_phys->zp_uid == 0) != 0) { 866ecb72030Sperrin zp->z_phys->zp_mode &= ~(S_ISUID | S_ISGID); 867169cdae2Smarks } 868169cdae2Smarks mutex_exit(&zp->z_acl_lock); 869169cdae2Smarks 870fa9e4066Sahrens /* 871feb08c6bSbillm * Update time stamp. NOTE: This marks the bonus buffer as 872feb08c6bSbillm * dirty, so we don't have to do it again for zp_size. 873fa9e4066Sahrens */ 874fa9e4066Sahrens zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 875fa9e4066Sahrens 876fa9e4066Sahrens /* 877feb08c6bSbillm * Update the file size (zp_size) if it has changed; 878feb08c6bSbillm * account for possible concurrent updates. 879fa9e4066Sahrens */ 880feb08c6bSbillm while ((end_size = zp->z_phys->zp_size) < uio->uio_loffset) 881fa9e4066Sahrens (void) atomic_cas_64(&zp->z_phys->zp_size, end_size, 882fa9e4066Sahrens uio->uio_loffset); 883feb08c6bSbillm zfs_log_write(zilog, tx, TX_WRITE, zp, woff, tx_bytes, ioflag); 884feb08c6bSbillm dmu_tx_commit(tx); 885fa9e4066Sahrens 886feb08c6bSbillm if (error != 0) 887feb08c6bSbillm break; 888feb08c6bSbillm ASSERT(tx_bytes == nbytes); 889feb08c6bSbillm n -= nbytes; 890feb08c6bSbillm } 891fa9e4066Sahrens 892c5c6ffa0Smaybee zfs_range_unlock(rl); 893fa9e4066Sahrens 894fa9e4066Sahrens /* 895fa9e4066Sahrens * If we're in replay mode, or we made no progress, return error. 896fa9e4066Sahrens * Otherwise, it's at least a partial write, so it's successful. 897fa9e4066Sahrens */ 8981209a471SNeil Perrin if (zfsvfs->z_replay || uio->uio_resid == start_resid) { 899fa9e4066Sahrens ZFS_EXIT(zfsvfs); 900fa9e4066Sahrens return (error); 901fa9e4066Sahrens } 902fa9e4066Sahrens 903b19a79ecSperrin if (ioflag & (FSYNC | FDSYNC)) 904b19a79ecSperrin zil_commit(zilog, zp->z_last_itx, zp->z_id); 905fa9e4066Sahrens 906fa9e4066Sahrens ZFS_EXIT(zfsvfs); 907fa9e4066Sahrens return (0); 908fa9e4066Sahrens } 909fa9e4066Sahrens 910c5c6ffa0Smaybee void 911b24ab676SJeff Bonwick zfs_get_done(zgd_t *zgd, int error) 912c5c6ffa0Smaybee { 913b24ab676SJeff Bonwick znode_t *zp = zgd->zgd_private; 914b24ab676SJeff Bonwick objset_t *os = zp->z_zfsvfs->z_os; 915b24ab676SJeff Bonwick 916b24ab676SJeff Bonwick if (zgd->zgd_db) 917b24ab676SJeff Bonwick dmu_buf_rele(zgd->zgd_db, zgd); 918b24ab676SJeff Bonwick 919b24ab676SJeff Bonwick zfs_range_unlock(zgd->zgd_rl); 920c5c6ffa0Smaybee 9219d3574bfSNeil Perrin /* 9229d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 9239d3574bfSNeil Perrin * txg stopped from syncing. 9249d3574bfSNeil Perrin */ 925b24ab676SJeff Bonwick VN_RELE_ASYNC(ZTOV(zp), dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 926b24ab676SJeff Bonwick 927b24ab676SJeff Bonwick if (error == 0 && zgd->zgd_bp) 928b24ab676SJeff Bonwick zil_add_block(zgd->zgd_zilog, zgd->zgd_bp); 929b24ab676SJeff Bonwick 93067bd71c6Sperrin kmem_free(zgd, sizeof (zgd_t)); 931c5c6ffa0Smaybee } 932c5c6ffa0Smaybee 933c87b8fc5SMark J Musante #ifdef DEBUG 934c87b8fc5SMark J Musante static int zil_fault_io = 0; 935c87b8fc5SMark J Musante #endif 936c87b8fc5SMark J Musante 937fa9e4066Sahrens /* 938fa9e4066Sahrens * Get data to generate a TX_WRITE intent log record. 939fa9e4066Sahrens */ 940fa9e4066Sahrens int 941c5c6ffa0Smaybee zfs_get_data(void *arg, lr_write_t *lr, char *buf, zio_t *zio) 942fa9e4066Sahrens { 943fa9e4066Sahrens zfsvfs_t *zfsvfs = arg; 944fa9e4066Sahrens objset_t *os = zfsvfs->z_os; 945fa9e4066Sahrens znode_t *zp; 946b24ab676SJeff Bonwick uint64_t object = lr->lr_foid; 947b24ab676SJeff Bonwick uint64_t offset = lr->lr_offset; 948b24ab676SJeff Bonwick uint64_t size = lr->lr_length; 949b24ab676SJeff Bonwick blkptr_t *bp = &lr->lr_blkptr; 950c5c6ffa0Smaybee dmu_buf_t *db; 95167bd71c6Sperrin zgd_t *zgd; 952fa9e4066Sahrens int error = 0; 953fa9e4066Sahrens 954b24ab676SJeff Bonwick ASSERT(zio != NULL); 955b24ab676SJeff Bonwick ASSERT(size != 0); 956fa9e4066Sahrens 957fa9e4066Sahrens /* 958104e2ed7Sperrin * Nothing to do if the file has been removed 959fa9e4066Sahrens */ 960b24ab676SJeff Bonwick if (zfs_zget(zfsvfs, object, &zp) != 0) 961fa9e4066Sahrens return (ENOENT); 962893a6d32Sahrens if (zp->z_unlinked) { 9639d3574bfSNeil Perrin /* 9649d3574bfSNeil Perrin * Release the vnode asynchronously as we currently have the 9659d3574bfSNeil Perrin * txg stopped from syncing. 9669d3574bfSNeil Perrin */ 9679d3574bfSNeil Perrin VN_RELE_ASYNC(ZTOV(zp), 9689d3574bfSNeil Perrin dsl_pool_vnrele_taskq(dmu_objset_pool(os))); 969fa9e4066Sahrens return (ENOENT); 970fa9e4066Sahrens } 971fa9e4066Sahrens 972b24ab676SJeff Bonwick zgd = (zgd_t *)kmem_zalloc(sizeof (zgd_t), KM_SLEEP); 973b24ab676SJeff Bonwick zgd->zgd_zilog = zfsvfs->z_log; 974b24ab676SJeff Bonwick zgd->zgd_private = zp; 975b24ab676SJeff Bonwick 976fa9e4066Sahrens /* 977fa9e4066Sahrens * Write records come in two flavors: immediate and indirect. 978fa9e4066Sahrens * For small writes it's cheaper to store the data with the 979fa9e4066Sahrens * log record (immediate); for large writes it's cheaper to 980fa9e4066Sahrens * sync the data and get a pointer to it (indirect) so that 981fa9e4066Sahrens * we don't have to write the data twice. 982fa9e4066Sahrens */ 983104e2ed7Sperrin if (buf != NULL) { /* immediate write */ 984b24ab676SJeff Bonwick zgd->zgd_rl = zfs_range_lock(zp, offset, size, RL_READER); 985104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 986b24ab676SJeff Bonwick if (offset >= zp->z_phys->zp_size) { 987104e2ed7Sperrin error = ENOENT; 988b24ab676SJeff Bonwick } else { 989b24ab676SJeff Bonwick error = dmu_read(os, object, offset, size, buf, 990b24ab676SJeff Bonwick DMU_READ_NO_PREFETCH); 991104e2ed7Sperrin } 992b24ab676SJeff Bonwick ASSERT(error == 0 || error == ENOENT); 993104e2ed7Sperrin } else { /* indirect write */ 994fa9e4066Sahrens /* 995104e2ed7Sperrin * Have to lock the whole block to ensure when it's 996104e2ed7Sperrin * written out and it's checksum is being calculated 997104e2ed7Sperrin * that no one can change the data. We need to re-check 998104e2ed7Sperrin * blocksize after we get the lock in case it's changed! 999fa9e4066Sahrens */ 1000104e2ed7Sperrin for (;;) { 1001b24ab676SJeff Bonwick uint64_t blkoff; 1002b24ab676SJeff Bonwick size = zp->z_blksz; 1003dfe73b3dSJeff Bonwick blkoff = ISP2(size) ? P2PHASE(offset, size) : offset; 1004b24ab676SJeff Bonwick offset -= blkoff; 1005b24ab676SJeff Bonwick zgd->zgd_rl = zfs_range_lock(zp, offset, size, 1006b24ab676SJeff Bonwick RL_READER); 1007b24ab676SJeff Bonwick if (zp->z_blksz == size) 1008104e2ed7Sperrin break; 1009b24ab676SJeff Bonwick offset += blkoff; 1010b24ab676SJeff Bonwick zfs_range_unlock(zgd->zgd_rl); 1011104e2ed7Sperrin } 1012104e2ed7Sperrin /* test for truncation needs to be done while range locked */ 1013dfe73b3dSJeff Bonwick if (lr->lr_offset >= zp->z_phys->zp_size) 1014104e2ed7Sperrin error = ENOENT; 1015c87b8fc5SMark J Musante #ifdef DEBUG 1016c87b8fc5SMark J Musante if (zil_fault_io) { 1017c87b8fc5SMark J Musante error = EIO; 1018c87b8fc5SMark J Musante zil_fault_io = 0; 1019c87b8fc5SMark J Musante } 1020c87b8fc5SMark J Musante #endif 1021b24ab676SJeff Bonwick if (error == 0) 1022b24ab676SJeff Bonwick error = dmu_buf_hold(os, object, offset, zgd, &db); 1023c87b8fc5SMark J Musante 1024975c32a0SNeil Perrin if (error == 0) { 1025b24ab676SJeff Bonwick zgd->zgd_db = db; 1026b24ab676SJeff Bonwick zgd->zgd_bp = bp; 1027b24ab676SJeff Bonwick 1028b24ab676SJeff Bonwick ASSERT(db->db_offset == offset); 1029b24ab676SJeff Bonwick ASSERT(db->db_size == size); 1030b24ab676SJeff Bonwick 1031b24ab676SJeff Bonwick error = dmu_sync(zio, lr->lr_common.lrc_txg, 1032b24ab676SJeff Bonwick zfs_get_done, zgd); 1033b24ab676SJeff Bonwick ASSERT(error || lr->lr_length <= zp->z_blksz); 1034b24ab676SJeff Bonwick 1035975c32a0SNeil Perrin /* 1036b24ab676SJeff Bonwick * On success, we need to wait for the write I/O 1037b24ab676SJeff Bonwick * initiated by dmu_sync() to complete before we can 1038b24ab676SJeff Bonwick * release this dbuf. We will finish everything up 1039b24ab676SJeff Bonwick * in the zfs_get_done() callback. 1040975c32a0SNeil Perrin */ 1041b24ab676SJeff Bonwick if (error == 0) 1042b24ab676SJeff Bonwick return (0); 1043975c32a0SNeil Perrin 1044b24ab676SJeff Bonwick if (error == EALREADY) { 1045b24ab676SJeff Bonwick lr->lr_common.lrc_txtype = TX_WRITE2; 1046b24ab676SJeff Bonwick error = 0; 1047b24ab676SJeff Bonwick } 1048975c32a0SNeil Perrin } 1049fa9e4066Sahrens } 1050b24ab676SJeff Bonwick 1051b24ab676SJeff Bonwick zfs_get_done(zgd, error); 1052b24ab676SJeff Bonwick 1053fa9e4066Sahrens return (error); 1054fa9e4066Sahrens } 1055fa9e4066Sahrens 1056fa9e4066Sahrens /*ARGSUSED*/ 1057fa9e4066Sahrens static int 1058da6c28aaSamw zfs_access(vnode_t *vp, int mode, int flag, cred_t *cr, 1059da6c28aaSamw caller_context_t *ct) 1060fa9e4066Sahrens { 1061fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1062fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 1063fa9e4066Sahrens int error; 1064fa9e4066Sahrens 10653cb34c60Sahrens ZFS_ENTER(zfsvfs); 10663cb34c60Sahrens ZFS_VERIFY_ZP(zp); 1067da6c28aaSamw 1068da6c28aaSamw if (flag & V_ACE_MASK) 1069da6c28aaSamw error = zfs_zaccess(zp, mode, flag, B_FALSE, cr); 1070da6c28aaSamw else 1071da6c28aaSamw error = zfs_zaccess_rwx(zp, mode, flag, cr); 1072da6c28aaSamw 1073fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1074fa9e4066Sahrens return (error); 1075fa9e4066Sahrens } 1076fa9e4066Sahrens 1077d47621a4STim Haley /* 1078d47621a4STim Haley * If vnode is for a device return a specfs vnode instead. 1079d47621a4STim Haley */ 1080d47621a4STim Haley static int 1081d47621a4STim Haley specvp_check(vnode_t **vpp, cred_t *cr) 1082d47621a4STim Haley { 1083d47621a4STim Haley int error = 0; 1084d47621a4STim Haley 1085d47621a4STim Haley if (IS_DEVVP(*vpp)) { 1086d47621a4STim Haley struct vnode *svp; 1087d47621a4STim Haley 1088d47621a4STim Haley svp = specvp(*vpp, (*vpp)->v_rdev, (*vpp)->v_type, cr); 1089d47621a4STim Haley VN_RELE(*vpp); 1090d47621a4STim Haley if (svp == NULL) 1091d47621a4STim Haley error = ENOSYS; 1092d47621a4STim Haley *vpp = svp; 1093d47621a4STim Haley } 1094d47621a4STim Haley return (error); 1095d47621a4STim Haley } 1096d47621a4STim Haley 1097d47621a4STim Haley 1098fa9e4066Sahrens /* 1099fa9e4066Sahrens * Lookup an entry in a directory, or an extended attribute directory. 1100fa9e4066Sahrens * If it exists, return a held vnode reference for it. 1101fa9e4066Sahrens * 1102fa9e4066Sahrens * IN: dvp - vnode of directory to search. 1103fa9e4066Sahrens * nm - name of entry to lookup. 1104fa9e4066Sahrens * pnp - full pathname to lookup [UNUSED]. 1105fa9e4066Sahrens * flags - LOOKUP_XATTR set if looking for an attribute. 1106fa9e4066Sahrens * rdir - root directory vnode [UNUSED]. 1107fa9e4066Sahrens * cr - credentials of caller. 1108da6c28aaSamw * ct - caller context 1109da6c28aaSamw * direntflags - directory lookup flags 1110da6c28aaSamw * realpnp - returned pathname. 1111fa9e4066Sahrens * 1112fa9e4066Sahrens * OUT: vpp - vnode of located entry, NULL if not found. 1113fa9e4066Sahrens * 1114fa9e4066Sahrens * RETURN: 0 if success 1115fa9e4066Sahrens * error code if failure 1116fa9e4066Sahrens * 1117fa9e4066Sahrens * Timestamps: 1118fa9e4066Sahrens * NA 1119fa9e4066Sahrens */ 1120fa9e4066Sahrens /* ARGSUSED */ 1121fa9e4066Sahrens static int 1122fa9e4066Sahrens zfs_lookup(vnode_t *dvp, char *nm, vnode_t **vpp, struct pathname *pnp, 1123da6c28aaSamw int flags, vnode_t *rdir, cred_t *cr, caller_context_t *ct, 1124da6c28aaSamw int *direntflags, pathname_t *realpnp) 1125fa9e4066Sahrens { 1126fa9e4066Sahrens znode_t *zdp = VTOZ(dvp); 1127fa9e4066Sahrens zfsvfs_t *zfsvfs = zdp->z_zfsvfs; 1128d47621a4STim Haley int error = 0; 1129d47621a4STim Haley 1130d47621a4STim Haley /* fast path */ 1131d47621a4STim Haley if (!(flags & (LOOKUP_XATTR | FIGNORECASE))) { 1132d47621a4STim Haley 1133d47621a4STim Haley if (dvp->v_type != VDIR) { 1134d47621a4STim Haley return (ENOTDIR); 1135d47621a4STim Haley } else if (zdp->z_dbuf == NULL) { 1136d47621a4STim Haley return (EIO); 1137d47621a4STim Haley } 1138d47621a4STim Haley 1139d47621a4STim Haley if (nm[0] == 0 || (nm[0] == '.' && nm[1] == '\0')) { 1140d47621a4STim Haley error = zfs_fastaccesschk_execute(zdp, cr); 1141d47621a4STim Haley if (!error) { 1142d47621a4STim Haley *vpp = dvp; 1143d47621a4STim Haley VN_HOLD(*vpp); 1144d47621a4STim Haley return (0); 1145d47621a4STim Haley } 1146d47621a4STim Haley return (error); 1147d47621a4STim Haley } else { 1148d47621a4STim Haley vnode_t *tvp = dnlc_lookup(dvp, nm); 1149d47621a4STim Haley 1150d47621a4STim Haley if (tvp) { 1151d47621a4STim Haley error = zfs_fastaccesschk_execute(zdp, cr); 1152d47621a4STim Haley if (error) { 1153d47621a4STim Haley VN_RELE(tvp); 1154d47621a4STim Haley return (error); 1155d47621a4STim Haley } 1156d47621a4STim Haley if (tvp == DNLC_NO_VNODE) { 1157d47621a4STim Haley VN_RELE(tvp); 1158d47621a4STim Haley return (ENOENT); 1159d47621a4STim Haley } else { 1160d47621a4STim Haley *vpp = tvp; 1161d47621a4STim Haley return (specvp_check(vpp, cr)); 1162d47621a4STim Haley } 1163d47621a4STim Haley } 1164d47621a4STim Haley } 1165d47621a4STim Haley } 1166d47621a4STim Haley 1167d47621a4STim Haley DTRACE_PROBE2(zfs__fastpath__lookup__miss, vnode_t *, dvp, char *, nm); 1168fa9e4066Sahrens 11693cb34c60Sahrens ZFS_ENTER(zfsvfs); 11703cb34c60Sahrens ZFS_VERIFY_ZP(zdp); 1171fa9e4066Sahrens 1172fa9e4066Sahrens *vpp = NULL; 1173fa9e4066Sahrens 1174fa9e4066Sahrens if (flags & LOOKUP_XATTR) { 11757b55fa8eSck /* 11767b55fa8eSck * If the xattr property is off, refuse the lookup request. 11777b55fa8eSck */ 11787b55fa8eSck if (!(zfsvfs->z_vfs->vfs_flag & VFS_XATTR)) { 11797b55fa8eSck ZFS_EXIT(zfsvfs); 11807b55fa8eSck return (EINVAL); 11817b55fa8eSck } 11827b55fa8eSck 1183fa9e4066Sahrens /* 1184fa9e4066Sahrens * We don't allow recursive attributes.. 1185fa9e4066Sahrens * Maybe someday we will. 1186fa9e4066Sahrens */ 1187fa9e4066Sahrens if (zdp->z_phys->zp_flags & ZFS_XATTR) { 1188fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1189fa9e4066Sahrens return (EINVAL); 1190fa9e4066Sahrens } 1191fa9e4066Sahrens 11923f063a9dSck if (error = zfs_get_xattrdir(VTOZ(dvp), vpp, cr, flags)) { 1193fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1194fa9e4066Sahrens return (error); 1195fa9e4066Sahrens } 1196fa9e4066Sahrens 1197fa9e4066Sahrens /* 1198fa9e4066Sahrens * Do we have permission to get into attribute directory? 1199fa9e4066Sahrens */ 1200fa9e4066Sahrens 1201da6c28aaSamw if (error = zfs_zaccess(VTOZ(*vpp), ACE_EXECUTE, 0, 1202da6c28aaSamw B_FALSE, cr)) { 1203fa9e4066Sahrens VN_RELE(*vpp); 1204da6c28aaSamw *vpp = NULL; 1205fa9e4066Sahrens } 1206fa9e4066Sahrens 1207fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1208fa9e4066Sahrens return (error); 1209fa9e4066Sahrens } 1210fa9e4066Sahrens 12110f2dc02eSek if (dvp->v_type != VDIR) { 12120f2dc02eSek ZFS_EXIT(zfsvfs); 1213736b9155Smarks return (ENOTDIR); 12140f2dc02eSek } 1215736b9155Smarks 1216fa9e4066Sahrens /* 1217fa9e4066Sahrens * Check accessibility of directory. 1218fa9e4066Sahrens */ 1219fa9e4066Sahrens 1220da6c28aaSamw if (error = zfs_zaccess(zdp, ACE_EXECUTE, 0, B_FALSE, cr)) { 1221fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1222fa9e4066Sahrens return (error); 1223fa9e4066Sahrens } 1224fa9e4066Sahrens 1225de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(nm, strlen(nm), 1226da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1227da6c28aaSamw ZFS_EXIT(zfsvfs); 1228da6c28aaSamw return (EILSEQ); 1229da6c28aaSamw } 1230fa9e4066Sahrens 1231da6c28aaSamw error = zfs_dirlook(zdp, nm, vpp, flags, direntflags, realpnp); 1232d47621a4STim Haley if (error == 0) 1233d47621a4STim Haley error = specvp_check(vpp, cr); 1234fa9e4066Sahrens 1235fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1236fa9e4066Sahrens return (error); 1237fa9e4066Sahrens } 1238fa9e4066Sahrens 1239fa9e4066Sahrens /* 1240fa9e4066Sahrens * Attempt to create a new entry in a directory. If the entry 1241fa9e4066Sahrens * already exists, truncate the file if permissible, else return 1242fa9e4066Sahrens * an error. Return the vp of the created or trunc'd file. 1243fa9e4066Sahrens * 1244fa9e4066Sahrens * IN: dvp - vnode of directory to put new file entry in. 1245fa9e4066Sahrens * name - name of new file entry. 1246fa9e4066Sahrens * vap - attributes of new file. 1247fa9e4066Sahrens * excl - flag indicating exclusive or non-exclusive mode. 1248fa9e4066Sahrens * mode - mode to open file with. 1249fa9e4066Sahrens * cr - credentials of caller. 1250fa9e4066Sahrens * flag - large file flag [UNUSED]. 1251da6c28aaSamw * ct - caller context 1252da6c28aaSamw * vsecp - ACL to be set 1253fa9e4066Sahrens * 1254fa9e4066Sahrens * OUT: vpp - vnode of created or trunc'd entry. 1255fa9e4066Sahrens * 1256fa9e4066Sahrens * RETURN: 0 if success 1257fa9e4066Sahrens * error code if failure 1258fa9e4066Sahrens * 1259fa9e4066Sahrens * Timestamps: 1260fa9e4066Sahrens * dvp - ctime|mtime updated if new entry created 1261fa9e4066Sahrens * vp - ctime|mtime always, atime if new 1262fa9e4066Sahrens */ 1263da6c28aaSamw 1264fa9e4066Sahrens /* ARGSUSED */ 1265fa9e4066Sahrens static int 1266fa9e4066Sahrens zfs_create(vnode_t *dvp, char *name, vattr_t *vap, vcexcl_t excl, 1267da6c28aaSamw int mode, vnode_t **vpp, cred_t *cr, int flag, caller_context_t *ct, 1268da6c28aaSamw vsecattr_t *vsecp) 1269fa9e4066Sahrens { 1270fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1271fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1272f18faf3fSek zilog_t *zilog; 1273f18faf3fSek objset_t *os; 1274fa9e4066Sahrens zfs_dirlock_t *dl; 1275fa9e4066Sahrens dmu_tx_t *tx; 1276fa9e4066Sahrens int error; 1277c1ce5987SMark Shellenbaum ksid_t *ksid; 1278c1ce5987SMark Shellenbaum uid_t uid; 1279c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 128089459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 128189459e17SMark Shellenbaum boolean_t fuid_dirtied; 1282da6c28aaSamw 1283da6c28aaSamw /* 1284da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1285da6c28aaSamw * make sure file system is at proper version 1286da6c28aaSamw */ 1287da6c28aaSamw 1288c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1289c1ce5987SMark Shellenbaum if (ksid) 1290c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1291c1ce5987SMark Shellenbaum else 1292c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1293c1ce5987SMark Shellenbaum 1294da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1295da6c28aaSamw (vsecp || (vap->va_mask & AT_XVATTR) || 1296c1ce5987SMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1297da6c28aaSamw return (EINVAL); 1298fa9e4066Sahrens 12993cb34c60Sahrens ZFS_ENTER(zfsvfs); 13003cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1301f18faf3fSek os = zfsvfs->z_os; 1302f18faf3fSek zilog = zfsvfs->z_log; 1303fa9e4066Sahrens 1304de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 1305da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1306da6c28aaSamw ZFS_EXIT(zfsvfs); 1307da6c28aaSamw return (EILSEQ); 1308da6c28aaSamw } 1309da6c28aaSamw 1310da6c28aaSamw if (vap->va_mask & AT_XVATTR) { 1311da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1312da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1313da6c28aaSamw ZFS_EXIT(zfsvfs); 1314da6c28aaSamw return (error); 1315da6c28aaSamw } 1316da6c28aaSamw } 1317fa9e4066Sahrens top: 1318fa9e4066Sahrens *vpp = NULL; 1319fa9e4066Sahrens 1320fa9e4066Sahrens if ((vap->va_mode & VSVTX) && secpolicy_vnode_stky_modify(cr)) 1321fa9e4066Sahrens vap->va_mode &= ~VSVTX; 1322fa9e4066Sahrens 1323fa9e4066Sahrens if (*name == '\0') { 1324fa9e4066Sahrens /* 1325fa9e4066Sahrens * Null component name refers to the directory itself. 1326fa9e4066Sahrens */ 1327fa9e4066Sahrens VN_HOLD(dvp); 1328fa9e4066Sahrens zp = dzp; 1329fa9e4066Sahrens dl = NULL; 1330fa9e4066Sahrens error = 0; 1331fa9e4066Sahrens } else { 1332fa9e4066Sahrens /* possible VN_HOLD(zp) */ 1333da6c28aaSamw int zflg = 0; 1334da6c28aaSamw 1335da6c28aaSamw if (flag & FIGNORECASE) 1336da6c28aaSamw zflg |= ZCILOOK; 1337da6c28aaSamw 1338da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1339da6c28aaSamw NULL, NULL); 1340da6c28aaSamw if (error) { 1341fa9e4066Sahrens if (strcmp(name, "..") == 0) 1342fa9e4066Sahrens error = EISDIR; 1343fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1344fa9e4066Sahrens return (error); 1345fa9e4066Sahrens } 1346fa9e4066Sahrens } 1347fa9e4066Sahrens if (zp == NULL) { 1348da6c28aaSamw uint64_t txtype; 1349da6c28aaSamw 1350fa9e4066Sahrens /* 1351fa9e4066Sahrens * Create a new file object and update the directory 1352fa9e4066Sahrens * to reference it. 1353fa9e4066Sahrens */ 1354da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 1355fa9e4066Sahrens goto out; 1356fa9e4066Sahrens } 1357fa9e4066Sahrens 1358fa9e4066Sahrens /* 1359fa9e4066Sahrens * We only support the creation of regular files in 1360fa9e4066Sahrens * extended attribute directories. 1361fa9e4066Sahrens */ 1362fa9e4066Sahrens if ((dzp->z_phys->zp_flags & ZFS_XATTR) && 1363fa9e4066Sahrens (vap->va_type != VREG)) { 1364fa9e4066Sahrens error = EINVAL; 1365fa9e4066Sahrens goto out; 1366fa9e4066Sahrens } 1367fa9e4066Sahrens 136889459e17SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, vsecp, 136989459e17SMark Shellenbaum &acl_ids)) != 0) 137089459e17SMark Shellenbaum goto out; 137114843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 13724929fd5eSTim Haley zfs_acl_ids_free(&acl_ids); 137314843421SMatthew Ahrens error = EDQUOT; 137414843421SMatthew Ahrens goto out; 137514843421SMatthew Ahrens } 137689459e17SMark Shellenbaum 1377fa9e4066Sahrens tx = dmu_tx_create(os); 1378fa9e4066Sahrens dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 137989459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 138014843421SMatthew Ahrens if (fuid_dirtied) 138114843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 1382fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 1383ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 138489459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) { 1385fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1386fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 1387da6c28aaSamw } 13881209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1389fa9e4066Sahrens if (error) { 139089459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1391fa9e4066Sahrens zfs_dirent_unlock(dl); 13921209a471SNeil Perrin if (error == ERESTART) { 13938a2f1b91Sahrens dmu_tx_wait(tx); 13948a2f1b91Sahrens dmu_tx_abort(tx); 1395fa9e4066Sahrens goto top; 1396fa9e4066Sahrens } 13978a2f1b91Sahrens dmu_tx_abort(tx); 1398fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1399fa9e4066Sahrens return (error); 1400fa9e4066Sahrens } 140189459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 140289459e17SMark Shellenbaum 140389459e17SMark Shellenbaum if (fuid_dirtied) 140489459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 140589459e17SMark Shellenbaum 1406fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 140789459e17SMark Shellenbaum 1408da6c28aaSamw txtype = zfs_log_create_txtype(Z_FILE, vsecp, vap); 1409da6c28aaSamw if (flag & FIGNORECASE) 1410da6c28aaSamw txtype |= TX_CI; 1411da6c28aaSamw zfs_log_create(zilog, tx, txtype, dzp, zp, name, 141289459e17SMark Shellenbaum vsecp, acl_ids.z_fuidp, vap); 141389459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1414fa9e4066Sahrens dmu_tx_commit(tx); 1415fa9e4066Sahrens } else { 1416da6c28aaSamw int aflags = (flag & FAPPEND) ? V_APPEND : 0; 1417da6c28aaSamw 1418fa9e4066Sahrens /* 1419fa9e4066Sahrens * A directory entry already exists for this name. 1420fa9e4066Sahrens */ 1421fa9e4066Sahrens /* 1422fa9e4066Sahrens * Can't truncate an existing file if in exclusive mode. 1423fa9e4066Sahrens */ 1424fa9e4066Sahrens if (excl == EXCL) { 1425fa9e4066Sahrens error = EEXIST; 1426fa9e4066Sahrens goto out; 1427fa9e4066Sahrens } 1428fa9e4066Sahrens /* 1429fa9e4066Sahrens * Can't open a directory for writing. 1430fa9e4066Sahrens */ 1431fa9e4066Sahrens if ((ZTOV(zp)->v_type == VDIR) && (mode & S_IWRITE)) { 1432fa9e4066Sahrens error = EISDIR; 1433fa9e4066Sahrens goto out; 1434fa9e4066Sahrens } 1435fa9e4066Sahrens /* 1436fa9e4066Sahrens * Verify requested access to file. 1437fa9e4066Sahrens */ 1438da6c28aaSamw if (mode && (error = zfs_zaccess_rwx(zp, mode, aflags, cr))) { 1439fa9e4066Sahrens goto out; 1440fa9e4066Sahrens } 1441fa9e4066Sahrens 1442fa9e4066Sahrens mutex_enter(&dzp->z_lock); 1443fa9e4066Sahrens dzp->z_seq++; 1444fa9e4066Sahrens mutex_exit(&dzp->z_lock); 1445fa9e4066Sahrens 14465730cc9aSmaybee /* 14475730cc9aSmaybee * Truncate regular files if requested. 14485730cc9aSmaybee */ 14495730cc9aSmaybee if ((ZTOV(zp)->v_type == VREG) && 1450fa9e4066Sahrens (vap->va_mask & AT_SIZE) && (vap->va_size == 0)) { 1451cdb0ab79Smaybee /* we can't hold any locks when calling zfs_freesp() */ 1452cdb0ab79Smaybee zfs_dirent_unlock(dl); 1453cdb0ab79Smaybee dl = NULL; 14545730cc9aSmaybee error = zfs_freesp(zp, 0, 0, mode, TRUE); 1455df2381bfSpraks if (error == 0) { 1456da6c28aaSamw vnevent_create(ZTOV(zp), ct); 1457df2381bfSpraks } 1458fa9e4066Sahrens } 1459fa9e4066Sahrens } 1460fa9e4066Sahrens out: 1461fa9e4066Sahrens 1462fa9e4066Sahrens if (dl) 1463fa9e4066Sahrens zfs_dirent_unlock(dl); 1464fa9e4066Sahrens 1465fa9e4066Sahrens if (error) { 1466fa9e4066Sahrens if (zp) 1467fa9e4066Sahrens VN_RELE(ZTOV(zp)); 1468fa9e4066Sahrens } else { 1469fa9e4066Sahrens *vpp = ZTOV(zp); 1470d47621a4STim Haley error = specvp_check(vpp, cr); 1471fa9e4066Sahrens } 1472fa9e4066Sahrens 1473fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1474fa9e4066Sahrens return (error); 1475fa9e4066Sahrens } 1476fa9e4066Sahrens 1477fa9e4066Sahrens /* 1478fa9e4066Sahrens * Remove an entry from a directory. 1479fa9e4066Sahrens * 1480fa9e4066Sahrens * IN: dvp - vnode of directory to remove entry from. 1481fa9e4066Sahrens * name - name of entry to remove. 1482fa9e4066Sahrens * cr - credentials of caller. 1483da6c28aaSamw * ct - caller context 1484da6c28aaSamw * flags - case flags 1485fa9e4066Sahrens * 1486fa9e4066Sahrens * RETURN: 0 if success 1487fa9e4066Sahrens * error code if failure 1488fa9e4066Sahrens * 1489fa9e4066Sahrens * Timestamps: 1490fa9e4066Sahrens * dvp - ctime|mtime 1491fa9e4066Sahrens * vp - ctime (if nlink > 0) 1492fa9e4066Sahrens */ 1493da6c28aaSamw /*ARGSUSED*/ 1494fa9e4066Sahrens static int 1495da6c28aaSamw zfs_remove(vnode_t *dvp, char *name, cred_t *cr, caller_context_t *ct, 1496da6c28aaSamw int flags) 1497fa9e4066Sahrens { 1498fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1499fa9e4066Sahrens znode_t *xzp = NULL; 1500fa9e4066Sahrens vnode_t *vp; 1501fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1502f18faf3fSek zilog_t *zilog; 1503fa9e4066Sahrens uint64_t acl_obj, xattr_obj; 1504fa9e4066Sahrens zfs_dirlock_t *dl; 1505fa9e4066Sahrens dmu_tx_t *tx; 1506893a6d32Sahrens boolean_t may_delete_now, delete_now = FALSE; 1507cdb0ab79Smaybee boolean_t unlinked, toobig = FALSE; 1508da6c28aaSamw uint64_t txtype; 1509da6c28aaSamw pathname_t *realnmp = NULL; 1510da6c28aaSamw pathname_t realnm; 1511fa9e4066Sahrens int error; 1512da6c28aaSamw int zflg = ZEXISTS; 1513fa9e4066Sahrens 15143cb34c60Sahrens ZFS_ENTER(zfsvfs); 15153cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1516f18faf3fSek zilog = zfsvfs->z_log; 1517fa9e4066Sahrens 1518da6c28aaSamw if (flags & FIGNORECASE) { 1519da6c28aaSamw zflg |= ZCILOOK; 1520da6c28aaSamw pn_alloc(&realnm); 1521da6c28aaSamw realnmp = &realnm; 1522da6c28aaSamw } 1523da6c28aaSamw 1524fa9e4066Sahrens top: 1525fa9e4066Sahrens /* 1526fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1527fa9e4066Sahrens */ 1528da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1529da6c28aaSamw NULL, realnmp)) { 1530da6c28aaSamw if (realnmp) 1531da6c28aaSamw pn_free(realnmp); 1532fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1533fa9e4066Sahrens return (error); 1534fa9e4066Sahrens } 1535fa9e4066Sahrens 1536fa9e4066Sahrens vp = ZTOV(zp); 1537fa9e4066Sahrens 1538fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1539fa9e4066Sahrens goto out; 1540fa9e4066Sahrens } 1541fa9e4066Sahrens 1542fa9e4066Sahrens /* 1543fa9e4066Sahrens * Need to use rmdir for removing directories. 1544fa9e4066Sahrens */ 1545fa9e4066Sahrens if (vp->v_type == VDIR) { 1546fa9e4066Sahrens error = EPERM; 1547fa9e4066Sahrens goto out; 1548fa9e4066Sahrens } 1549fa9e4066Sahrens 1550da6c28aaSamw vnevent_remove(vp, dvp, name, ct); 1551fa9e4066Sahrens 1552da6c28aaSamw if (realnmp) 1553ab04eb8eStimh dnlc_remove(dvp, realnmp->pn_buf); 1554da6c28aaSamw else 1555da6c28aaSamw dnlc_remove(dvp, name); 1556033f9833Sek 1557fa9e4066Sahrens mutex_enter(&vp->v_lock); 1558fa9e4066Sahrens may_delete_now = vp->v_count == 1 && !vn_has_cached_data(vp); 1559fa9e4066Sahrens mutex_exit(&vp->v_lock); 1560fa9e4066Sahrens 1561fa9e4066Sahrens /* 1562893a6d32Sahrens * We may delete the znode now, or we may put it in the unlinked set; 1563fa9e4066Sahrens * it depends on whether we're the last link, and on whether there are 1564fa9e4066Sahrens * other holds on the vnode. So we dmu_tx_hold() the right things to 1565fa9e4066Sahrens * allow for either case. 1566fa9e4066Sahrens */ 1567fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1568ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1569fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1570cdb0ab79Smaybee if (may_delete_now) { 1571cdb0ab79Smaybee toobig = 1572cdb0ab79Smaybee zp->z_phys->zp_size > zp->z_blksz * DMU_MAX_DELETEBLKCNT; 1573cdb0ab79Smaybee /* if the file is too big, only hold_free a token amount */ 1574cdb0ab79Smaybee dmu_tx_hold_free(tx, zp->z_id, 0, 1575cdb0ab79Smaybee (toobig ? DMU_MAX_ACCESS : DMU_OBJECT_END)); 1576cdb0ab79Smaybee } 1577fa9e4066Sahrens 1578fa9e4066Sahrens /* are there any extended attributes? */ 1579fa9e4066Sahrens if ((xattr_obj = zp->z_phys->zp_xattr) != 0) { 1580fa9e4066Sahrens /* XXX - do we need this if we are deleting? */ 1581fa9e4066Sahrens dmu_tx_hold_bonus(tx, xattr_obj); 1582fa9e4066Sahrens } 1583fa9e4066Sahrens 1584fa9e4066Sahrens /* are there any additional acls */ 1585fa9e4066Sahrens if ((acl_obj = zp->z_phys->zp_acl.z_acl_extern_obj) != 0 && 1586fa9e4066Sahrens may_delete_now) 1587fa9e4066Sahrens dmu_tx_hold_free(tx, acl_obj, 0, DMU_OBJECT_END); 1588fa9e4066Sahrens 1589fa9e4066Sahrens /* charge as an update -- would be nice not to charge at all */ 1590893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 1591fa9e4066Sahrens 15921209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1593fa9e4066Sahrens if (error) { 1594fa9e4066Sahrens zfs_dirent_unlock(dl); 1595fa9e4066Sahrens VN_RELE(vp); 15961209a471SNeil Perrin if (error == ERESTART) { 15978a2f1b91Sahrens dmu_tx_wait(tx); 15988a2f1b91Sahrens dmu_tx_abort(tx); 1599fa9e4066Sahrens goto top; 1600fa9e4066Sahrens } 1601da6c28aaSamw if (realnmp) 1602da6c28aaSamw pn_free(realnmp); 16038a2f1b91Sahrens dmu_tx_abort(tx); 1604fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1605fa9e4066Sahrens return (error); 1606fa9e4066Sahrens } 1607fa9e4066Sahrens 1608fa9e4066Sahrens /* 1609fa9e4066Sahrens * Remove the directory entry. 1610fa9e4066Sahrens */ 1611da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, &unlinked); 1612fa9e4066Sahrens 1613fa9e4066Sahrens if (error) { 1614fa9e4066Sahrens dmu_tx_commit(tx); 1615fa9e4066Sahrens goto out; 1616fa9e4066Sahrens } 1617fa9e4066Sahrens 1618893a6d32Sahrens if (unlinked) { 1619fa9e4066Sahrens mutex_enter(&vp->v_lock); 1620cdb0ab79Smaybee delete_now = may_delete_now && !toobig && 1621fa9e4066Sahrens vp->v_count == 1 && !vn_has_cached_data(vp) && 1622fa9e4066Sahrens zp->z_phys->zp_xattr == xattr_obj && 1623fa9e4066Sahrens zp->z_phys->zp_acl.z_acl_extern_obj == acl_obj; 1624fa9e4066Sahrens mutex_exit(&vp->v_lock); 1625fa9e4066Sahrens } 1626fa9e4066Sahrens 1627fa9e4066Sahrens if (delete_now) { 1628fa9e4066Sahrens if (zp->z_phys->zp_xattr) { 1629fa9e4066Sahrens error = zfs_zget(zfsvfs, zp->z_phys->zp_xattr, &xzp); 1630fa9e4066Sahrens ASSERT3U(error, ==, 0); 1631fa9e4066Sahrens ASSERT3U(xzp->z_phys->zp_links, ==, 2); 1632fa9e4066Sahrens dmu_buf_will_dirty(xzp->z_dbuf, tx); 1633fa9e4066Sahrens mutex_enter(&xzp->z_lock); 1634893a6d32Sahrens xzp->z_unlinked = 1; 1635fa9e4066Sahrens xzp->z_phys->zp_links = 0; 1636fa9e4066Sahrens mutex_exit(&xzp->z_lock); 1637893a6d32Sahrens zfs_unlinked_add(xzp, tx); 1638fa9e4066Sahrens zp->z_phys->zp_xattr = 0; /* probably unnecessary */ 1639fa9e4066Sahrens } 1640fa9e4066Sahrens mutex_enter(&zp->z_lock); 1641fa9e4066Sahrens mutex_enter(&vp->v_lock); 1642fa9e4066Sahrens vp->v_count--; 1643fa9e4066Sahrens ASSERT3U(vp->v_count, ==, 0); 1644fa9e4066Sahrens mutex_exit(&vp->v_lock); 1645fa9e4066Sahrens mutex_exit(&zp->z_lock); 1646fa9e4066Sahrens zfs_znode_delete(zp, tx); 1647893a6d32Sahrens } else if (unlinked) { 1648893a6d32Sahrens zfs_unlinked_add(zp, tx); 1649fa9e4066Sahrens } 1650fa9e4066Sahrens 1651da6c28aaSamw txtype = TX_REMOVE; 1652da6c28aaSamw if (flags & FIGNORECASE) 1653da6c28aaSamw txtype |= TX_CI; 1654da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1655fa9e4066Sahrens 1656fa9e4066Sahrens dmu_tx_commit(tx); 1657fa9e4066Sahrens out: 1658da6c28aaSamw if (realnmp) 1659da6c28aaSamw pn_free(realnmp); 1660da6c28aaSamw 1661fa9e4066Sahrens zfs_dirent_unlock(dl); 1662fa9e4066Sahrens 1663fa9e4066Sahrens if (!delete_now) { 1664fa9e4066Sahrens VN_RELE(vp); 1665fa9e4066Sahrens } else if (xzp) { 1666cdb0ab79Smaybee /* this rele is delayed to prevent nesting transactions */ 1667fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 1668fa9e4066Sahrens } 1669fa9e4066Sahrens 1670fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1671fa9e4066Sahrens return (error); 1672fa9e4066Sahrens } 1673fa9e4066Sahrens 1674fa9e4066Sahrens /* 1675fa9e4066Sahrens * Create a new directory and insert it into dvp using the name 1676fa9e4066Sahrens * provided. Return a pointer to the inserted directory. 1677fa9e4066Sahrens * 1678fa9e4066Sahrens * IN: dvp - vnode of directory to add subdir to. 1679fa9e4066Sahrens * dirname - name of new directory. 1680fa9e4066Sahrens * vap - attributes of new directory. 1681fa9e4066Sahrens * cr - credentials of caller. 1682da6c28aaSamw * ct - caller context 1683da6c28aaSamw * vsecp - ACL to be set 1684fa9e4066Sahrens * 1685fa9e4066Sahrens * OUT: vpp - vnode of created directory. 1686fa9e4066Sahrens * 1687fa9e4066Sahrens * RETURN: 0 if success 1688fa9e4066Sahrens * error code if failure 1689fa9e4066Sahrens * 1690fa9e4066Sahrens * Timestamps: 1691fa9e4066Sahrens * dvp - ctime|mtime updated 1692fa9e4066Sahrens * vp - ctime|mtime|atime updated 1693fa9e4066Sahrens */ 1694da6c28aaSamw /*ARGSUSED*/ 1695fa9e4066Sahrens static int 1696da6c28aaSamw zfs_mkdir(vnode_t *dvp, char *dirname, vattr_t *vap, vnode_t **vpp, cred_t *cr, 1697da6c28aaSamw caller_context_t *ct, int flags, vsecattr_t *vsecp) 1698fa9e4066Sahrens { 1699fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 1700fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1701f18faf3fSek zilog_t *zilog; 1702fa9e4066Sahrens zfs_dirlock_t *dl; 1703da6c28aaSamw uint64_t txtype; 1704fa9e4066Sahrens dmu_tx_t *tx; 1705fa9e4066Sahrens int error; 1706da6c28aaSamw int zf = ZNEW; 1707c1ce5987SMark Shellenbaum ksid_t *ksid; 1708c1ce5987SMark Shellenbaum uid_t uid; 1709c1ce5987SMark Shellenbaum gid_t gid = crgetgid(cr); 171089459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 171189459e17SMark Shellenbaum boolean_t fuid_dirtied; 1712fa9e4066Sahrens 1713fa9e4066Sahrens ASSERT(vap->va_type == VDIR); 1714fa9e4066Sahrens 1715da6c28aaSamw /* 1716da6c28aaSamw * If we have an ephemeral id, ACL, or XVATTR then 1717da6c28aaSamw * make sure file system is at proper version 1718da6c28aaSamw */ 1719da6c28aaSamw 1720c1ce5987SMark Shellenbaum ksid = crgetsid(cr, KSID_OWNER); 1721c1ce5987SMark Shellenbaum if (ksid) 1722c1ce5987SMark Shellenbaum uid = ksid_getid(ksid); 1723c1ce5987SMark Shellenbaum else 1724c1ce5987SMark Shellenbaum uid = crgetuid(cr); 1725da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 1726c1ce5987SMark Shellenbaum (vsecp || (vap->va_mask & AT_XVATTR) || 1727756962ecSMark Shellenbaum IS_EPHEMERAL(uid) || IS_EPHEMERAL(gid))) 1728da6c28aaSamw return (EINVAL); 1729da6c28aaSamw 17303cb34c60Sahrens ZFS_ENTER(zfsvfs); 17313cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1732f18faf3fSek zilog = zfsvfs->z_log; 1733fa9e4066Sahrens 1734fa9e4066Sahrens if (dzp->z_phys->zp_flags & ZFS_XATTR) { 1735fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1736fa9e4066Sahrens return (EINVAL); 1737fa9e4066Sahrens } 1738da6c28aaSamw 1739de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(dirname, 1740da6c28aaSamw strlen(dirname), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 1741da6c28aaSamw ZFS_EXIT(zfsvfs); 1742da6c28aaSamw return (EILSEQ); 1743da6c28aaSamw } 1744da6c28aaSamw if (flags & FIGNORECASE) 1745da6c28aaSamw zf |= ZCILOOK; 1746da6c28aaSamw 1747da6c28aaSamw if (vap->va_mask & AT_XVATTR) 1748da6c28aaSamw if ((error = secpolicy_xvattr((xvattr_t *)vap, 1749da6c28aaSamw crgetuid(cr), cr, vap->va_type)) != 0) { 1750da6c28aaSamw ZFS_EXIT(zfsvfs); 1751da6c28aaSamw return (error); 1752da6c28aaSamw } 1753fa9e4066Sahrens 1754fa9e4066Sahrens /* 1755fa9e4066Sahrens * First make sure the new directory doesn't exist. 1756fa9e4066Sahrens */ 1757da6c28aaSamw top: 1758da6c28aaSamw *vpp = NULL; 1759da6c28aaSamw 1760da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, dirname, &zp, zf, 1761da6c28aaSamw NULL, NULL)) { 1762fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1763fa9e4066Sahrens return (error); 1764fa9e4066Sahrens } 1765fa9e4066Sahrens 1766da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_SUBDIRECTORY, 0, B_FALSE, cr)) { 1767d2443e76Smarks zfs_dirent_unlock(dl); 1768d2443e76Smarks ZFS_EXIT(zfsvfs); 1769d2443e76Smarks return (error); 1770d2443e76Smarks } 1771d2443e76Smarks 177289459e17SMark Shellenbaum if ((error = zfs_acl_ids_create(dzp, 0, vap, cr, vsecp, 177389459e17SMark Shellenbaum &acl_ids)) != 0) { 177489459e17SMark Shellenbaum zfs_dirent_unlock(dl); 177589459e17SMark Shellenbaum ZFS_EXIT(zfsvfs); 177689459e17SMark Shellenbaum return (error); 1777da6c28aaSamw } 177814843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 17794929fd5eSTim Haley zfs_acl_ids_free(&acl_ids); 178014843421SMatthew Ahrens zfs_dirent_unlock(dl); 178114843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 178214843421SMatthew Ahrens return (EDQUOT); 178314843421SMatthew Ahrens } 178489459e17SMark Shellenbaum 1785fa9e4066Sahrens /* 1786fa9e4066Sahrens * Add a new entry to the directory. 1787fa9e4066Sahrens */ 1788fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1789ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, dirname); 1790ea8dc4b6Seschrock dmu_tx_hold_zap(tx, DMU_NEW_OBJECT, FALSE, NULL); 179189459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 179214843421SMatthew Ahrens if (fuid_dirtied) 179314843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 179489459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) 1795fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 1796fa9e4066Sahrens 0, SPA_MAXBLOCKSIZE); 17971209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1798fa9e4066Sahrens if (error) { 179989459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1800fa9e4066Sahrens zfs_dirent_unlock(dl); 18011209a471SNeil Perrin if (error == ERESTART) { 18028a2f1b91Sahrens dmu_tx_wait(tx); 18038a2f1b91Sahrens dmu_tx_abort(tx); 1804fa9e4066Sahrens goto top; 1805fa9e4066Sahrens } 18068a2f1b91Sahrens dmu_tx_abort(tx); 1807fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1808fa9e4066Sahrens return (error); 1809fa9e4066Sahrens } 1810fa9e4066Sahrens 1811fa9e4066Sahrens /* 1812fa9e4066Sahrens * Create new node. 1813fa9e4066Sahrens */ 181489459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 1815fa9e4066Sahrens 181689459e17SMark Shellenbaum if (fuid_dirtied) 181789459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 1818fa9e4066Sahrens /* 1819fa9e4066Sahrens * Now put new name in parent dir. 1820fa9e4066Sahrens */ 1821fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 1822fa9e4066Sahrens 1823fa9e4066Sahrens *vpp = ZTOV(zp); 1824fa9e4066Sahrens 1825da6c28aaSamw txtype = zfs_log_create_txtype(Z_DIR, vsecp, vap); 1826da6c28aaSamw if (flags & FIGNORECASE) 1827da6c28aaSamw txtype |= TX_CI; 182889459e17SMark Shellenbaum zfs_log_create(zilog, tx, txtype, dzp, zp, dirname, vsecp, 182989459e17SMark Shellenbaum acl_ids.z_fuidp, vap); 1830da6c28aaSamw 183189459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 1832fa9e4066Sahrens dmu_tx_commit(tx); 1833fa9e4066Sahrens 1834fa9e4066Sahrens zfs_dirent_unlock(dl); 1835fa9e4066Sahrens 1836fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1837fa9e4066Sahrens return (0); 1838fa9e4066Sahrens } 1839fa9e4066Sahrens 1840fa9e4066Sahrens /* 1841fa9e4066Sahrens * Remove a directory subdir entry. If the current working 1842fa9e4066Sahrens * directory is the same as the subdir to be removed, the 1843fa9e4066Sahrens * remove will fail. 1844fa9e4066Sahrens * 1845fa9e4066Sahrens * IN: dvp - vnode of directory to remove from. 1846fa9e4066Sahrens * name - name of directory to be removed. 1847fa9e4066Sahrens * cwd - vnode of current working directory. 1848fa9e4066Sahrens * cr - credentials of caller. 1849da6c28aaSamw * ct - caller context 1850da6c28aaSamw * flags - case flags 1851fa9e4066Sahrens * 1852fa9e4066Sahrens * RETURN: 0 if success 1853fa9e4066Sahrens * error code if failure 1854fa9e4066Sahrens * 1855fa9e4066Sahrens * Timestamps: 1856fa9e4066Sahrens * dvp - ctime|mtime updated 1857fa9e4066Sahrens */ 1858da6c28aaSamw /*ARGSUSED*/ 1859fa9e4066Sahrens static int 1860da6c28aaSamw zfs_rmdir(vnode_t *dvp, char *name, vnode_t *cwd, cred_t *cr, 1861da6c28aaSamw caller_context_t *ct, int flags) 1862fa9e4066Sahrens { 1863fa9e4066Sahrens znode_t *dzp = VTOZ(dvp); 1864fa9e4066Sahrens znode_t *zp; 1865fa9e4066Sahrens vnode_t *vp; 1866fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 1867f18faf3fSek zilog_t *zilog; 1868fa9e4066Sahrens zfs_dirlock_t *dl; 1869fa9e4066Sahrens dmu_tx_t *tx; 1870fa9e4066Sahrens int error; 1871da6c28aaSamw int zflg = ZEXISTS; 1872fa9e4066Sahrens 18733cb34c60Sahrens ZFS_ENTER(zfsvfs); 18743cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 1875f18faf3fSek zilog = zfsvfs->z_log; 1876fa9e4066Sahrens 1877da6c28aaSamw if (flags & FIGNORECASE) 1878da6c28aaSamw zflg |= ZCILOOK; 1879fa9e4066Sahrens top: 1880fa9e4066Sahrens zp = NULL; 1881fa9e4066Sahrens 1882fa9e4066Sahrens /* 1883fa9e4066Sahrens * Attempt to lock directory; fail if entry doesn't exist. 1884fa9e4066Sahrens */ 1885da6c28aaSamw if (error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, 1886da6c28aaSamw NULL, NULL)) { 1887fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1888fa9e4066Sahrens return (error); 1889fa9e4066Sahrens } 1890fa9e4066Sahrens 1891fa9e4066Sahrens vp = ZTOV(zp); 1892fa9e4066Sahrens 1893fa9e4066Sahrens if (error = zfs_zaccess_delete(dzp, zp, cr)) { 1894fa9e4066Sahrens goto out; 1895fa9e4066Sahrens } 1896fa9e4066Sahrens 1897fa9e4066Sahrens if (vp->v_type != VDIR) { 1898fa9e4066Sahrens error = ENOTDIR; 1899fa9e4066Sahrens goto out; 1900fa9e4066Sahrens } 1901fa9e4066Sahrens 1902fa9e4066Sahrens if (vp == cwd) { 1903fa9e4066Sahrens error = EINVAL; 1904fa9e4066Sahrens goto out; 1905fa9e4066Sahrens } 1906fa9e4066Sahrens 1907da6c28aaSamw vnevent_rmdir(vp, dvp, name, ct); 1908fa9e4066Sahrens 1909fa9e4066Sahrens /* 1910af2c4821Smaybee * Grab a lock on the directory to make sure that noone is 1911af2c4821Smaybee * trying to add (or lookup) entries while we are removing it. 1912af2c4821Smaybee */ 1913af2c4821Smaybee rw_enter(&zp->z_name_lock, RW_WRITER); 1914af2c4821Smaybee 1915af2c4821Smaybee /* 1916af2c4821Smaybee * Grab a lock on the parent pointer to make sure we play well 1917fa9e4066Sahrens * with the treewalk and directory rename code. 1918fa9e4066Sahrens */ 1919fa9e4066Sahrens rw_enter(&zp->z_parent_lock, RW_WRITER); 1920fa9e4066Sahrens 1921fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 1922ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, FALSE, name); 1923fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 1924893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 19251209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 1926fa9e4066Sahrens if (error) { 1927fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1928af2c4821Smaybee rw_exit(&zp->z_name_lock); 1929fa9e4066Sahrens zfs_dirent_unlock(dl); 1930fa9e4066Sahrens VN_RELE(vp); 19311209a471SNeil Perrin if (error == ERESTART) { 19328a2f1b91Sahrens dmu_tx_wait(tx); 19338a2f1b91Sahrens dmu_tx_abort(tx); 1934fa9e4066Sahrens goto top; 1935fa9e4066Sahrens } 19368a2f1b91Sahrens dmu_tx_abort(tx); 1937fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1938fa9e4066Sahrens return (error); 1939fa9e4066Sahrens } 1940fa9e4066Sahrens 1941da6c28aaSamw error = zfs_link_destroy(dl, zp, tx, zflg, NULL); 1942fa9e4066Sahrens 1943da6c28aaSamw if (error == 0) { 1944da6c28aaSamw uint64_t txtype = TX_RMDIR; 1945da6c28aaSamw if (flags & FIGNORECASE) 1946da6c28aaSamw txtype |= TX_CI; 1947da6c28aaSamw zfs_log_remove(zilog, tx, txtype, dzp, name); 1948da6c28aaSamw } 1949fa9e4066Sahrens 1950fa9e4066Sahrens dmu_tx_commit(tx); 1951fa9e4066Sahrens 1952fa9e4066Sahrens rw_exit(&zp->z_parent_lock); 1953af2c4821Smaybee rw_exit(&zp->z_name_lock); 1954fa9e4066Sahrens out: 1955fa9e4066Sahrens zfs_dirent_unlock(dl); 1956fa9e4066Sahrens 1957fa9e4066Sahrens VN_RELE(vp); 1958fa9e4066Sahrens 1959fa9e4066Sahrens ZFS_EXIT(zfsvfs); 1960fa9e4066Sahrens return (error); 1961fa9e4066Sahrens } 1962fa9e4066Sahrens 1963fa9e4066Sahrens /* 1964fa9e4066Sahrens * Read as many directory entries as will fit into the provided 1965fa9e4066Sahrens * buffer from the given directory cursor position (specified in 1966fa9e4066Sahrens * the uio structure. 1967fa9e4066Sahrens * 1968fa9e4066Sahrens * IN: vp - vnode of directory to read. 1969fa9e4066Sahrens * uio - structure supplying read location, range info, 1970fa9e4066Sahrens * and return buffer. 1971fa9e4066Sahrens * cr - credentials of caller. 1972da6c28aaSamw * ct - caller context 1973da6c28aaSamw * flags - case flags 1974fa9e4066Sahrens * 1975fa9e4066Sahrens * OUT: uio - updated offset and range, buffer filled. 1976fa9e4066Sahrens * eofp - set to true if end-of-file detected. 1977fa9e4066Sahrens * 1978fa9e4066Sahrens * RETURN: 0 if success 1979fa9e4066Sahrens * error code if failure 1980fa9e4066Sahrens * 1981fa9e4066Sahrens * Timestamps: 1982fa9e4066Sahrens * vp - atime updated 1983fa9e4066Sahrens * 1984fa9e4066Sahrens * Note that the low 4 bits of the cookie returned by zap is always zero. 1985fa9e4066Sahrens * This allows us to use the low range for "special" directory entries: 1986fa9e4066Sahrens * We use 0 for '.', and 1 for '..'. If this is the root of the filesystem, 1987fa9e4066Sahrens * we use the offset 2 for the '.zfs' directory. 1988fa9e4066Sahrens */ 1989fa9e4066Sahrens /* ARGSUSED */ 1990fa9e4066Sahrens static int 1991da6c28aaSamw zfs_readdir(vnode_t *vp, uio_t *uio, cred_t *cr, int *eofp, 1992da6c28aaSamw caller_context_t *ct, int flags) 1993fa9e4066Sahrens { 1994fa9e4066Sahrens znode_t *zp = VTOZ(vp); 1995fa9e4066Sahrens iovec_t *iovp; 1996da6c28aaSamw edirent_t *eodp; 1997fa9e4066Sahrens dirent64_t *odp; 1998fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 19997f6e3e7dSperrin objset_t *os; 2000fa9e4066Sahrens caddr_t outbuf; 2001fa9e4066Sahrens size_t bufsize; 2002fa9e4066Sahrens zap_cursor_t zc; 2003fa9e4066Sahrens zap_attribute_t zap; 2004fa9e4066Sahrens uint_t bytes_wanted; 2005fa9e4066Sahrens uint64_t offset; /* must be unsigned; checks for < 1 */ 2006fa9e4066Sahrens int local_eof; 20077f6e3e7dSperrin int outcount; 20087f6e3e7dSperrin int error; 20097f6e3e7dSperrin uint8_t prefetch; 2010b38f0970Sck boolean_t check_sysattrs; 2011fa9e4066Sahrens 20123cb34c60Sahrens ZFS_ENTER(zfsvfs); 20133cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2014fa9e4066Sahrens 2015fa9e4066Sahrens /* 2016fa9e4066Sahrens * If we are not given an eof variable, 2017fa9e4066Sahrens * use a local one. 2018fa9e4066Sahrens */ 2019fa9e4066Sahrens if (eofp == NULL) 2020fa9e4066Sahrens eofp = &local_eof; 2021fa9e4066Sahrens 2022fa9e4066Sahrens /* 2023fa9e4066Sahrens * Check for valid iov_len. 2024fa9e4066Sahrens */ 2025fa9e4066Sahrens if (uio->uio_iov->iov_len <= 0) { 2026fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2027fa9e4066Sahrens return (EINVAL); 2028fa9e4066Sahrens } 2029fa9e4066Sahrens 2030fa9e4066Sahrens /* 2031fa9e4066Sahrens * Quit if directory has been removed (posix) 2032fa9e4066Sahrens */ 2033893a6d32Sahrens if ((*eofp = zp->z_unlinked) != 0) { 2034fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2035fa9e4066Sahrens return (0); 2036fa9e4066Sahrens } 2037fa9e4066Sahrens 20387f6e3e7dSperrin error = 0; 20397f6e3e7dSperrin os = zfsvfs->z_os; 20407f6e3e7dSperrin offset = uio->uio_loffset; 20417f6e3e7dSperrin prefetch = zp->z_zn_prefetch; 20427f6e3e7dSperrin 2043fa9e4066Sahrens /* 2044fa9e4066Sahrens * Initialize the iterator cursor. 2045fa9e4066Sahrens */ 2046fa9e4066Sahrens if (offset <= 3) { 2047fa9e4066Sahrens /* 2048fa9e4066Sahrens * Start iteration from the beginning of the directory. 2049fa9e4066Sahrens */ 20507f6e3e7dSperrin zap_cursor_init(&zc, os, zp->z_id); 2051fa9e4066Sahrens } else { 2052fa9e4066Sahrens /* 2053fa9e4066Sahrens * The offset is a serialized cursor. 2054fa9e4066Sahrens */ 20557f6e3e7dSperrin zap_cursor_init_serialized(&zc, os, zp->z_id, offset); 2056fa9e4066Sahrens } 2057fa9e4066Sahrens 2058fa9e4066Sahrens /* 2059fa9e4066Sahrens * Get space to change directory entries into fs independent format. 2060fa9e4066Sahrens */ 2061fa9e4066Sahrens iovp = uio->uio_iov; 2062fa9e4066Sahrens bytes_wanted = iovp->iov_len; 2063fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) { 2064fa9e4066Sahrens bufsize = bytes_wanted; 2065fa9e4066Sahrens outbuf = kmem_alloc(bufsize, KM_SLEEP); 2066fa9e4066Sahrens odp = (struct dirent64 *)outbuf; 2067fa9e4066Sahrens } else { 2068fa9e4066Sahrens bufsize = bytes_wanted; 2069fa9e4066Sahrens odp = (struct dirent64 *)iovp->iov_base; 2070fa9e4066Sahrens } 2071da6c28aaSamw eodp = (struct edirent *)odp; 2072fa9e4066Sahrens 2073b38f0970Sck /* 20749660e5cbSJanice Chang * If this VFS supports the system attribute view interface; and 20759660e5cbSJanice Chang * we're looking at an extended attribute directory; and we care 20769660e5cbSJanice Chang * about normalization conflicts on this vfs; then we must check 20779660e5cbSJanice Chang * for normalization conflicts with the sysattr name space. 2078b38f0970Sck */ 20799660e5cbSJanice Chang check_sysattrs = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 2080b38f0970Sck (vp->v_flag & V_XATTRDIR) && zfsvfs->z_norm && 2081b38f0970Sck (flags & V_RDDIR_ENTFLAGS); 2082b38f0970Sck 2083fa9e4066Sahrens /* 2084fa9e4066Sahrens * Transform to file-system independent format 2085fa9e4066Sahrens */ 2086fa9e4066Sahrens outcount = 0; 2087fa9e4066Sahrens while (outcount < bytes_wanted) { 2088b1b8ab34Slling ino64_t objnum; 2089b1b8ab34Slling ushort_t reclen; 2090b1b8ab34Slling off64_t *next; 2091b1b8ab34Slling 2092fa9e4066Sahrens /* 2093fa9e4066Sahrens * Special case `.', `..', and `.zfs'. 2094fa9e4066Sahrens */ 2095fa9e4066Sahrens if (offset == 0) { 2096fa9e4066Sahrens (void) strcpy(zap.za_name, "."); 2097da6c28aaSamw zap.za_normalization_conflict = 0; 2098b1b8ab34Slling objnum = zp->z_id; 2099fa9e4066Sahrens } else if (offset == 1) { 2100fa9e4066Sahrens (void) strcpy(zap.za_name, ".."); 2101da6c28aaSamw zap.za_normalization_conflict = 0; 2102b1b8ab34Slling objnum = zp->z_phys->zp_parent; 2103fa9e4066Sahrens } else if (offset == 2 && zfs_show_ctldir(zp)) { 2104fa9e4066Sahrens (void) strcpy(zap.za_name, ZFS_CTLDIR_NAME); 2105da6c28aaSamw zap.za_normalization_conflict = 0; 2106b1b8ab34Slling objnum = ZFSCTL_INO_ROOT; 2107fa9e4066Sahrens } else { 2108fa9e4066Sahrens /* 2109fa9e4066Sahrens * Grab next entry. 2110fa9e4066Sahrens */ 2111fa9e4066Sahrens if (error = zap_cursor_retrieve(&zc, &zap)) { 2112fa9e4066Sahrens if ((*eofp = (error == ENOENT)) != 0) 2113fa9e4066Sahrens break; 2114fa9e4066Sahrens else 2115fa9e4066Sahrens goto update; 2116fa9e4066Sahrens } 2117fa9e4066Sahrens 2118fa9e4066Sahrens if (zap.za_integer_length != 8 || 2119fa9e4066Sahrens zap.za_num_integers != 1) { 2120fa9e4066Sahrens cmn_err(CE_WARN, "zap_readdir: bad directory " 2121fa9e4066Sahrens "entry, obj = %lld, offset = %lld\n", 2122fa9e4066Sahrens (u_longlong_t)zp->z_id, 2123fa9e4066Sahrens (u_longlong_t)offset); 2124fa9e4066Sahrens error = ENXIO; 2125fa9e4066Sahrens goto update; 2126fa9e4066Sahrens } 2127b1b8ab34Slling 2128b1b8ab34Slling objnum = ZFS_DIRENT_OBJ(zap.za_first_integer); 2129b1b8ab34Slling /* 2130b1b8ab34Slling * MacOS X can extract the object type here such as: 2131b1b8ab34Slling * uint8_t type = ZFS_DIRENT_TYPE(zap.za_first_integer); 2132b1b8ab34Slling */ 2133b38f0970Sck 2134b38f0970Sck if (check_sysattrs && !zap.za_normalization_conflict) { 2135b38f0970Sck zap.za_normalization_conflict = 2136b38f0970Sck xattr_sysattr_casechk(zap.za_name); 2137b38f0970Sck } 2138fa9e4066Sahrens } 2139da6c28aaSamw 2140e802abbdSTim Haley if (flags & V_RDDIR_ACCFILTER) { 2141e802abbdSTim Haley /* 2142e802abbdSTim Haley * If we have no access at all, don't include 2143e802abbdSTim Haley * this entry in the returned information 2144e802abbdSTim Haley */ 2145e802abbdSTim Haley znode_t *ezp; 2146e802abbdSTim Haley if (zfs_zget(zp->z_zfsvfs, objnum, &ezp) != 0) 2147e802abbdSTim Haley goto skip_entry; 2148e802abbdSTim Haley if (!zfs_has_access(ezp, cr)) { 2149e802abbdSTim Haley VN_RELE(ZTOV(ezp)); 2150e802abbdSTim Haley goto skip_entry; 2151e802abbdSTim Haley } 2152e802abbdSTim Haley VN_RELE(ZTOV(ezp)); 2153e802abbdSTim Haley } 2154e802abbdSTim Haley 2155da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) 2156da6c28aaSamw reclen = EDIRENT_RECLEN(strlen(zap.za_name)); 2157da6c28aaSamw else 2158da6c28aaSamw reclen = DIRENT64_RECLEN(strlen(zap.za_name)); 2159fa9e4066Sahrens 2160fa9e4066Sahrens /* 2161fa9e4066Sahrens * Will this entry fit in the buffer? 2162fa9e4066Sahrens */ 2163b1b8ab34Slling if (outcount + reclen > bufsize) { 2164fa9e4066Sahrens /* 2165fa9e4066Sahrens * Did we manage to fit anything in the buffer? 2166fa9e4066Sahrens */ 2167fa9e4066Sahrens if (!outcount) { 2168fa9e4066Sahrens error = EINVAL; 2169fa9e4066Sahrens goto update; 2170fa9e4066Sahrens } 2171fa9e4066Sahrens break; 2172fa9e4066Sahrens } 2173da6c28aaSamw if (flags & V_RDDIR_ENTFLAGS) { 2174da6c28aaSamw /* 2175da6c28aaSamw * Add extended flag entry: 2176da6c28aaSamw */ 2177da6c28aaSamw eodp->ed_ino = objnum; 2178da6c28aaSamw eodp->ed_reclen = reclen; 2179da6c28aaSamw /* NOTE: ed_off is the offset for the *next* entry */ 2180da6c28aaSamw next = &(eodp->ed_off); 2181da6c28aaSamw eodp->ed_eflags = zap.za_normalization_conflict ? 2182da6c28aaSamw ED_CASE_CONFLICT : 0; 2183da6c28aaSamw (void) strncpy(eodp->ed_name, zap.za_name, 2184da6c28aaSamw EDIRENT_NAMELEN(reclen)); 2185da6c28aaSamw eodp = (edirent_t *)((intptr_t)eodp + reclen); 2186da6c28aaSamw } else { 2187da6c28aaSamw /* 2188da6c28aaSamw * Add normal entry: 2189da6c28aaSamw */ 2190da6c28aaSamw odp->d_ino = objnum; 2191da6c28aaSamw odp->d_reclen = reclen; 2192da6c28aaSamw /* NOTE: d_off is the offset for the *next* entry */ 2193da6c28aaSamw next = &(odp->d_off); 2194da6c28aaSamw (void) strncpy(odp->d_name, zap.za_name, 2195da6c28aaSamw DIRENT64_NAMELEN(reclen)); 2196da6c28aaSamw odp = (dirent64_t *)((intptr_t)odp + reclen); 2197da6c28aaSamw } 2198b1b8ab34Slling outcount += reclen; 2199fa9e4066Sahrens 2200fa9e4066Sahrens ASSERT(outcount <= bufsize); 2201fa9e4066Sahrens 2202fa9e4066Sahrens /* Prefetch znode */ 22037f6e3e7dSperrin if (prefetch) 2204b1b8ab34Slling dmu_prefetch(os, objnum, 0, 0); 2205fa9e4066Sahrens 2206e802abbdSTim Haley skip_entry: 2207fa9e4066Sahrens /* 2208fa9e4066Sahrens * Move to the next entry, fill in the previous offset. 2209fa9e4066Sahrens */ 2210fa9e4066Sahrens if (offset > 2 || (offset == 2 && !zfs_show_ctldir(zp))) { 2211fa9e4066Sahrens zap_cursor_advance(&zc); 2212fa9e4066Sahrens offset = zap_cursor_serialize(&zc); 2213fa9e4066Sahrens } else { 2214fa9e4066Sahrens offset += 1; 2215fa9e4066Sahrens } 2216fa9e4066Sahrens *next = offset; 2217fa9e4066Sahrens } 22187f6e3e7dSperrin zp->z_zn_prefetch = B_FALSE; /* a lookup will re-enable pre-fetching */ 2219fa9e4066Sahrens 2220fa9e4066Sahrens if (uio->uio_segflg == UIO_SYSSPACE && uio->uio_iovcnt == 1) { 2221fa9e4066Sahrens iovp->iov_base += outcount; 2222fa9e4066Sahrens iovp->iov_len -= outcount; 2223fa9e4066Sahrens uio->uio_resid -= outcount; 2224fa9e4066Sahrens } else if (error = uiomove(outbuf, (long)outcount, UIO_READ, uio)) { 2225fa9e4066Sahrens /* 2226fa9e4066Sahrens * Reset the pointer. 2227fa9e4066Sahrens */ 2228fa9e4066Sahrens offset = uio->uio_loffset; 2229fa9e4066Sahrens } 2230fa9e4066Sahrens 2231fa9e4066Sahrens update: 223287e5029aSahrens zap_cursor_fini(&zc); 2233fa9e4066Sahrens if (uio->uio_segflg != UIO_SYSSPACE || uio->uio_iovcnt != 1) 2234fa9e4066Sahrens kmem_free(outbuf, bufsize); 2235fa9e4066Sahrens 2236fa9e4066Sahrens if (error == ENOENT) 2237fa9e4066Sahrens error = 0; 2238fa9e4066Sahrens 2239fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 2240fa9e4066Sahrens 2241fa9e4066Sahrens uio->uio_loffset = offset; 2242fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2243fa9e4066Sahrens return (error); 2244fa9e4066Sahrens } 2245fa9e4066Sahrens 2246ec533521Sfr ulong_t zfs_fsync_sync_cnt = 4; 2247ec533521Sfr 2248fa9e4066Sahrens static int 2249da6c28aaSamw zfs_fsync(vnode_t *vp, int syncflag, cred_t *cr, caller_context_t *ct) 2250fa9e4066Sahrens { 2251fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2252fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2253fa9e4066Sahrens 2254b468a217Seschrock /* 2255b468a217Seschrock * Regardless of whether this is required for standards conformance, 2256b468a217Seschrock * this is the logical behavior when fsync() is called on a file with 2257b468a217Seschrock * dirty pages. We use B_ASYNC since the ZIL transactions are already 2258b468a217Seschrock * going to be pushed out as part of the zil_commit(). 2259b468a217Seschrock */ 2260b468a217Seschrock if (vn_has_cached_data(vp) && !(syncflag & FNODSYNC) && 2261b468a217Seschrock (vp->v_type == VREG) && !(IS_SWAPVP(vp))) 2262da6c28aaSamw (void) VOP_PUTPAGE(vp, (offset_t)0, (size_t)0, B_ASYNC, cr, ct); 2263b468a217Seschrock 2264ec533521Sfr (void) tsd_set(zfs_fsyncer_key, (void *)zfs_fsync_sync_cnt); 2265ec533521Sfr 22663cb34c60Sahrens ZFS_ENTER(zfsvfs); 22673cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2268b19a79ecSperrin zil_commit(zfsvfs->z_log, zp->z_last_itx, zp->z_id); 2269fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2270fa9e4066Sahrens return (0); 2271fa9e4066Sahrens } 2272fa9e4066Sahrens 2273da6c28aaSamw 2274fa9e4066Sahrens /* 2275fa9e4066Sahrens * Get the requested file attributes and place them in the provided 2276fa9e4066Sahrens * vattr structure. 2277fa9e4066Sahrens * 2278fa9e4066Sahrens * IN: vp - vnode of file. 2279fa9e4066Sahrens * vap - va_mask identifies requested attributes. 2280da6c28aaSamw * If AT_XVATTR set, then optional attrs are requested 2281da6c28aaSamw * flags - ATTR_NOACLCHECK (CIFS server context) 2282fa9e4066Sahrens * cr - credentials of caller. 2283da6c28aaSamw * ct - caller context 2284fa9e4066Sahrens * 2285fa9e4066Sahrens * OUT: vap - attribute values. 2286fa9e4066Sahrens * 2287fa9e4066Sahrens * RETURN: 0 (always succeeds) 2288fa9e4066Sahrens */ 2289fa9e4066Sahrens /* ARGSUSED */ 2290fa9e4066Sahrens static int 2291da6c28aaSamw zfs_getattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2292da6c28aaSamw caller_context_t *ct) 2293fa9e4066Sahrens { 2294fa9e4066Sahrens znode_t *zp = VTOZ(vp); 2295fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2296f18faf3fSek znode_phys_t *pzp; 2297da6c28aaSamw int error = 0; 2298ecd6cf80Smarks uint64_t links; 2299da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2300da6c28aaSamw xoptattr_t *xoap = NULL; 2301da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 2302fa9e4066Sahrens 23033cb34c60Sahrens ZFS_ENTER(zfsvfs); 23043cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2305f18faf3fSek pzp = zp->z_phys; 2306fa9e4066Sahrens 2307da6c28aaSamw /* 2308da6c28aaSamw * If ACL is trivial don't bother looking for ACE_READ_ATTRIBUTES. 2309da6c28aaSamw * Also, if we are the owner don't bother, since owner should 2310da6c28aaSamw * always be allowed to read basic attributes of file. 2311da6c28aaSamw */ 2312da6c28aaSamw if (!(pzp->zp_flags & ZFS_ACL_TRIVIAL) && 2313da6c28aaSamw (pzp->zp_uid != crgetuid(cr))) { 2314da6c28aaSamw if (error = zfs_zaccess(zp, ACE_READ_ATTRIBUTES, 0, 2315da6c28aaSamw skipaclchk, cr)) { 2316da6c28aaSamw ZFS_EXIT(zfsvfs); 2317da6c28aaSamw return (error); 2318da6c28aaSamw } 2319da6c28aaSamw } 2320da6c28aaSamw 2321fa9e4066Sahrens /* 2322fa9e4066Sahrens * Return all attributes. It's cheaper to provide the answer 2323fa9e4066Sahrens * than to determine whether we were asked the question. 2324fa9e4066Sahrens */ 2325fa9e4066Sahrens 232634f345efSRay Hassan mutex_enter(&zp->z_lock); 2327fa9e4066Sahrens vap->va_type = vp->v_type; 2328fa9e4066Sahrens vap->va_mode = pzp->zp_mode & MODEMASK; 2329bda89588Sjp zfs_fuid_map_ids(zp, cr, &vap->va_uid, &vap->va_gid); 2330fa9e4066Sahrens vap->va_fsid = zp->z_zfsvfs->z_vfs->vfs_dev; 2331fa9e4066Sahrens vap->va_nodeid = zp->z_id; 2332ecd6cf80Smarks if ((vp->v_flag & VROOT) && zfs_show_ctldir(zp)) 2333ecd6cf80Smarks links = pzp->zp_links + 1; 2334ecd6cf80Smarks else 2335ecd6cf80Smarks links = pzp->zp_links; 2336ecd6cf80Smarks vap->va_nlink = MIN(links, UINT32_MAX); /* nlink_t limit! */ 2337fa9e4066Sahrens vap->va_size = pzp->zp_size; 233872fc53bcSmarks vap->va_rdev = vp->v_rdev; 2339fa9e4066Sahrens vap->va_seq = zp->z_seq; 2340fa9e4066Sahrens 2341fa9e4066Sahrens /* 2342da6c28aaSamw * Add in any requested optional attributes and the create time. 2343da6c28aaSamw * Also set the corresponding bits in the returned attribute bitmap. 2344fa9e4066Sahrens */ 2345da6c28aaSamw if ((xoap = xva_getxoptattr(xvap)) != NULL && zfsvfs->z_use_fuids) { 2346da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_ARCHIVE)) { 2347da6c28aaSamw xoap->xoa_archive = 2348da6c28aaSamw ((pzp->zp_flags & ZFS_ARCHIVE) != 0); 2349da6c28aaSamw XVA_SET_RTN(xvap, XAT_ARCHIVE); 2350da6c28aaSamw } 2351da6c28aaSamw 2352da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_READONLY)) { 2353da6c28aaSamw xoap->xoa_readonly = 2354da6c28aaSamw ((pzp->zp_flags & ZFS_READONLY) != 0); 2355da6c28aaSamw XVA_SET_RTN(xvap, XAT_READONLY); 2356da6c28aaSamw } 2357da6c28aaSamw 2358da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_SYSTEM)) { 2359da6c28aaSamw xoap->xoa_system = 2360da6c28aaSamw ((pzp->zp_flags & ZFS_SYSTEM) != 0); 2361da6c28aaSamw XVA_SET_RTN(xvap, XAT_SYSTEM); 2362da6c28aaSamw } 2363da6c28aaSamw 2364da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_HIDDEN)) { 2365da6c28aaSamw xoap->xoa_hidden = 2366da6c28aaSamw ((pzp->zp_flags & ZFS_HIDDEN) != 0); 2367da6c28aaSamw XVA_SET_RTN(xvap, XAT_HIDDEN); 2368da6c28aaSamw } 2369da6c28aaSamw 2370da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2371da6c28aaSamw xoap->xoa_nounlink = 2372da6c28aaSamw ((pzp->zp_flags & ZFS_NOUNLINK) != 0); 2373da6c28aaSamw XVA_SET_RTN(xvap, XAT_NOUNLINK); 2374da6c28aaSamw } 2375da6c28aaSamw 2376da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2377da6c28aaSamw xoap->xoa_immutable = 2378da6c28aaSamw ((pzp->zp_flags & ZFS_IMMUTABLE) != 0); 2379da6c28aaSamw XVA_SET_RTN(xvap, XAT_IMMUTABLE); 2380da6c28aaSamw } 2381da6c28aaSamw 2382da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2383da6c28aaSamw xoap->xoa_appendonly = 2384da6c28aaSamw ((pzp->zp_flags & ZFS_APPENDONLY) != 0); 2385da6c28aaSamw XVA_SET_RTN(xvap, XAT_APPENDONLY); 2386da6c28aaSamw } 2387da6c28aaSamw 2388da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2389da6c28aaSamw xoap->xoa_nodump = 2390da6c28aaSamw ((pzp->zp_flags & ZFS_NODUMP) != 0); 2391da6c28aaSamw XVA_SET_RTN(xvap, XAT_NODUMP); 2392da6c28aaSamw } 2393da6c28aaSamw 2394da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_OPAQUE)) { 2395da6c28aaSamw xoap->xoa_opaque = 2396da6c28aaSamw ((pzp->zp_flags & ZFS_OPAQUE) != 0); 2397da6c28aaSamw XVA_SET_RTN(xvap, XAT_OPAQUE); 2398da6c28aaSamw } 2399da6c28aaSamw 2400da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2401da6c28aaSamw xoap->xoa_av_quarantined = 2402da6c28aaSamw ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0); 2403da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_QUARANTINED); 2404da6c28aaSamw } 2405da6c28aaSamw 2406da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2407da6c28aaSamw xoap->xoa_av_modified = 2408da6c28aaSamw ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0); 2409da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_MODIFIED); 2410da6c28aaSamw } 2411da6c28aaSamw 2412da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) && 2413da6c28aaSamw vp->v_type == VREG && 2414da6c28aaSamw (pzp->zp_flags & ZFS_BONUS_SCANSTAMP)) { 2415da6c28aaSamw size_t len; 2416da6c28aaSamw dmu_object_info_t doi; 2417da6c28aaSamw 2418da6c28aaSamw /* 2419da6c28aaSamw * Only VREG files have anti-virus scanstamps, so we 2420da6c28aaSamw * won't conflict with symlinks in the bonus buffer. 2421da6c28aaSamw */ 2422da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2423da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2424da6c28aaSamw sizeof (znode_phys_t); 2425da6c28aaSamw if (len <= doi.doi_bonus_size) { 2426da6c28aaSamw /* 2427da6c28aaSamw * pzp points to the start of the 2428da6c28aaSamw * znode_phys_t. pzp + 1 points to the 2429da6c28aaSamw * first byte after the znode_phys_t. 2430da6c28aaSamw */ 2431da6c28aaSamw (void) memcpy(xoap->xoa_av_scanstamp, 2432da6c28aaSamw pzp + 1, 2433da6c28aaSamw sizeof (xoap->xoa_av_scanstamp)); 2434da6c28aaSamw XVA_SET_RTN(xvap, XAT_AV_SCANSTAMP); 2435da6c28aaSamw } 2436da6c28aaSamw } 2437da6c28aaSamw 2438da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_CREATETIME)) { 2439da6c28aaSamw ZFS_TIME_DECODE(&xoap->xoa_createtime, pzp->zp_crtime); 2440da6c28aaSamw XVA_SET_RTN(xvap, XAT_CREATETIME); 2441fa9e4066Sahrens } 24427a286c47SDai Ngo 24437a286c47SDai Ngo if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 24447a286c47SDai Ngo xoap->xoa_reparse = 24457a286c47SDai Ngo ((pzp->zp_flags & ZFS_REPARSE) != 0); 24467a286c47SDai Ngo XVA_SET_RTN(xvap, XAT_REPARSE); 24477a286c47SDai Ngo } 2448fa9e4066Sahrens } 2449fa9e4066Sahrens 2450da6c28aaSamw ZFS_TIME_DECODE(&vap->va_atime, pzp->zp_atime); 2451da6c28aaSamw ZFS_TIME_DECODE(&vap->va_mtime, pzp->zp_mtime); 2452da6c28aaSamw ZFS_TIME_DECODE(&vap->va_ctime, pzp->zp_ctime); 2453da6c28aaSamw 2454fa9e4066Sahrens mutex_exit(&zp->z_lock); 2455fa9e4066Sahrens 2456fa9e4066Sahrens dmu_object_size_from_db(zp->z_dbuf, &vap->va_blksize, &vap->va_nblocks); 2457fa9e4066Sahrens 2458fa9e4066Sahrens if (zp->z_blksz == 0) { 2459fa9e4066Sahrens /* 2460fa9e4066Sahrens * Block size hasn't been set; suggest maximal I/O transfers. 2461fa9e4066Sahrens */ 2462fa9e4066Sahrens vap->va_blksize = zfsvfs->z_max_blksz; 2463fa9e4066Sahrens } 2464fa9e4066Sahrens 2465fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2466fa9e4066Sahrens return (0); 2467fa9e4066Sahrens } 2468fa9e4066Sahrens 2469fa9e4066Sahrens /* 2470fa9e4066Sahrens * Set the file attributes to the values contained in the 2471fa9e4066Sahrens * vattr structure. 2472fa9e4066Sahrens * 2473fa9e4066Sahrens * IN: vp - vnode of file to be modified. 2474fa9e4066Sahrens * vap - new attribute values. 2475da6c28aaSamw * If AT_XVATTR set, then optional attrs are being set 2476fa9e4066Sahrens * flags - ATTR_UTIME set if non-default time values provided. 2477da6c28aaSamw * - ATTR_NOACLCHECK (CIFS context only). 2478fa9e4066Sahrens * cr - credentials of caller. 2479da6c28aaSamw * ct - caller context 2480fa9e4066Sahrens * 2481fa9e4066Sahrens * RETURN: 0 if success 2482fa9e4066Sahrens * error code if failure 2483fa9e4066Sahrens * 2484fa9e4066Sahrens * Timestamps: 2485fa9e4066Sahrens * vp - ctime updated, mtime updated if size changed. 2486fa9e4066Sahrens */ 2487fa9e4066Sahrens /* ARGSUSED */ 2488fa9e4066Sahrens static int 2489fa9e4066Sahrens zfs_setattr(vnode_t *vp, vattr_t *vap, int flags, cred_t *cr, 2490fa9e4066Sahrens caller_context_t *ct) 2491fa9e4066Sahrens { 2492f18faf3fSek znode_t *zp = VTOZ(vp); 2493f18faf3fSek znode_phys_t *pzp; 2494fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 2495f18faf3fSek zilog_t *zilog; 2496fa9e4066Sahrens dmu_tx_t *tx; 2497fa9e4066Sahrens vattr_t oldva; 2498ae4caef8SMark Shellenbaum xvattr_t tmpxvattr; 24995730cc9aSmaybee uint_t mask = vap->va_mask; 25005730cc9aSmaybee uint_t saved_mask; 2501f92daba9Smarks int trim_mask = 0; 2502fa9e4066Sahrens uint64_t new_mode; 250389459e17SMark Shellenbaum uint64_t new_uid, new_gid; 2504d2443e76Smarks znode_t *attrzp; 2505fa9e4066Sahrens int need_policy = FALSE; 2506fa9e4066Sahrens int err; 2507da6c28aaSamw zfs_fuid_info_t *fuidp = NULL; 2508da6c28aaSamw xvattr_t *xvap = (xvattr_t *)vap; /* vap may be an xvattr_t * */ 2509da6c28aaSamw xoptattr_t *xoap; 25104c841f60Smarks zfs_acl_t *aclp = NULL; 2511da6c28aaSamw boolean_t skipaclchk = (flags & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 251289459e17SMark Shellenbaum boolean_t fuid_dirtied = B_FALSE; 2513fa9e4066Sahrens 2514fa9e4066Sahrens if (mask == 0) 2515fa9e4066Sahrens return (0); 2516fa9e4066Sahrens 2517fa9e4066Sahrens if (mask & AT_NOSET) 2518fa9e4066Sahrens return (EINVAL); 2519fa9e4066Sahrens 25203cb34c60Sahrens ZFS_ENTER(zfsvfs); 25213cb34c60Sahrens ZFS_VERIFY_ZP(zp); 2522da6c28aaSamw 2523da6c28aaSamw pzp = zp->z_phys; 2524da6c28aaSamw zilog = zfsvfs->z_log; 2525da6c28aaSamw 2526da6c28aaSamw /* 2527da6c28aaSamw * Make sure that if we have ephemeral uid/gid or xvattr specified 2528da6c28aaSamw * that file system is at proper version level 2529da6c28aaSamw */ 2530da6c28aaSamw 2531da6c28aaSamw if (zfsvfs->z_use_fuids == B_FALSE && 2532da6c28aaSamw (((mask & AT_UID) && IS_EPHEMERAL(vap->va_uid)) || 2533da6c28aaSamw ((mask & AT_GID) && IS_EPHEMERAL(vap->va_gid)) || 253402dcba3bStimh (mask & AT_XVATTR))) { 253502dcba3bStimh ZFS_EXIT(zfsvfs); 2536da6c28aaSamw return (EINVAL); 253702dcba3bStimh } 2538da6c28aaSamw 253902dcba3bStimh if (mask & AT_SIZE && vp->v_type == VDIR) { 254002dcba3bStimh ZFS_EXIT(zfsvfs); 2541fa9e4066Sahrens return (EISDIR); 254202dcba3bStimh } 2543fa9e4066Sahrens 254402dcba3bStimh if (mask & AT_SIZE && vp->v_type != VREG && vp->v_type != VFIFO) { 254502dcba3bStimh ZFS_EXIT(zfsvfs); 254684c5a155Smarks return (EINVAL); 254702dcba3bStimh } 254884c5a155Smarks 2549da6c28aaSamw /* 2550da6c28aaSamw * If this is an xvattr_t, then get a pointer to the structure of 2551da6c28aaSamw * optional attributes. If this is NULL, then we have a vattr_t. 2552da6c28aaSamw */ 2553da6c28aaSamw xoap = xva_getxoptattr(xvap); 2554da6c28aaSamw 2555ae4caef8SMark Shellenbaum xva_init(&tmpxvattr); 2556ae4caef8SMark Shellenbaum 2557da6c28aaSamw /* 2558da6c28aaSamw * Immutable files can only alter immutable bit and atime 2559da6c28aaSamw */ 2560da6c28aaSamw if ((pzp->zp_flags & ZFS_IMMUTABLE) && 2561da6c28aaSamw ((mask & (AT_SIZE|AT_UID|AT_GID|AT_MTIME|AT_MODE)) || 256202dcba3bStimh ((mask & AT_XVATTR) && XVA_ISSET_REQ(xvap, XAT_CREATETIME)))) { 256302dcba3bStimh ZFS_EXIT(zfsvfs); 2564da6c28aaSamw return (EPERM); 256502dcba3bStimh } 2566da6c28aaSamw 256702dcba3bStimh if ((mask & AT_SIZE) && (pzp->zp_flags & ZFS_READONLY)) { 256802dcba3bStimh ZFS_EXIT(zfsvfs); 2569da6c28aaSamw return (EPERM); 257002dcba3bStimh } 2571fa9e4066Sahrens 257293129341Smarks /* 257393129341Smarks * Verify timestamps doesn't overflow 32 bits. 257493129341Smarks * ZFS can handle large timestamps, but 32bit syscalls can't 257593129341Smarks * handle times greater than 2039. This check should be removed 257693129341Smarks * once large timestamps are fully supported. 257793129341Smarks */ 257893129341Smarks if (mask & (AT_ATIME | AT_MTIME)) { 257993129341Smarks if (((mask & AT_ATIME) && TIMESPEC_OVERFLOW(&vap->va_atime)) || 258093129341Smarks ((mask & AT_MTIME) && TIMESPEC_OVERFLOW(&vap->va_mtime))) { 258193129341Smarks ZFS_EXIT(zfsvfs); 258293129341Smarks return (EOVERFLOW); 258393129341Smarks } 258493129341Smarks } 258593129341Smarks 2586fa9e4066Sahrens top: 2587d2443e76Smarks attrzp = NULL; 2588fa9e4066Sahrens 2589d47621a4STim Haley /* Can this be moved to before the top label? */ 2590fa9e4066Sahrens if (zfsvfs->z_vfs->vfs_flag & VFS_RDONLY) { 2591fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2592fa9e4066Sahrens return (EROFS); 2593fa9e4066Sahrens } 2594fa9e4066Sahrens 2595fa9e4066Sahrens /* 2596fa9e4066Sahrens * First validate permissions 2597fa9e4066Sahrens */ 2598fa9e4066Sahrens 2599fa9e4066Sahrens if (mask & AT_SIZE) { 2600da6c28aaSamw err = zfs_zaccess(zp, ACE_WRITE_DATA, 0, skipaclchk, cr); 2601fa9e4066Sahrens if (err) { 2602fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2603fa9e4066Sahrens return (err); 2604fa9e4066Sahrens } 26055730cc9aSmaybee /* 26065730cc9aSmaybee * XXX - Note, we are not providing any open 26075730cc9aSmaybee * mode flags here (like FNDELAY), so we may 26085730cc9aSmaybee * block if there are locks present... this 26095730cc9aSmaybee * should be addressed in openat(). 26105730cc9aSmaybee */ 2611cdb0ab79Smaybee /* XXX - would it be OK to generate a log record here? */ 2612cdb0ab79Smaybee err = zfs_freesp(zp, vap->va_size, 0, 0, FALSE); 26135730cc9aSmaybee if (err) { 26145730cc9aSmaybee ZFS_EXIT(zfsvfs); 26155730cc9aSmaybee return (err); 26165730cc9aSmaybee } 2617fa9e4066Sahrens } 2618fa9e4066Sahrens 2619da6c28aaSamw if (mask & (AT_ATIME|AT_MTIME) || 2620da6c28aaSamw ((mask & AT_XVATTR) && (XVA_ISSET_REQ(xvap, XAT_HIDDEN) || 2621da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_READONLY) || 2622da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_ARCHIVE) || 2623da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_CREATETIME) || 2624da6c28aaSamw XVA_ISSET_REQ(xvap, XAT_SYSTEM)))) 2625da6c28aaSamw need_policy = zfs_zaccess(zp, ACE_WRITE_ATTRIBUTES, 0, 2626da6c28aaSamw skipaclchk, cr); 2627fa9e4066Sahrens 2628fa9e4066Sahrens if (mask & (AT_UID|AT_GID)) { 2629fa9e4066Sahrens int idmask = (mask & (AT_UID|AT_GID)); 2630fa9e4066Sahrens int take_owner; 2631fa9e4066Sahrens int take_group; 2632fa9e4066Sahrens 2633a933bc41Smarks /* 2634a933bc41Smarks * NOTE: even if a new mode is being set, 2635a933bc41Smarks * we may clear S_ISUID/S_ISGID bits. 2636a933bc41Smarks */ 2637a933bc41Smarks 2638a933bc41Smarks if (!(mask & AT_MODE)) 2639a933bc41Smarks vap->va_mode = pzp->zp_mode; 2640a933bc41Smarks 2641fa9e4066Sahrens /* 2642fa9e4066Sahrens * Take ownership or chgrp to group we are a member of 2643fa9e4066Sahrens */ 2644fa9e4066Sahrens 2645fa9e4066Sahrens take_owner = (mask & AT_UID) && (vap->va_uid == crgetuid(cr)); 2646da6c28aaSamw take_group = (mask & AT_GID) && 2647da6c28aaSamw zfs_groupmember(zfsvfs, vap->va_gid, cr); 2648fa9e4066Sahrens 2649fa9e4066Sahrens /* 2650fa9e4066Sahrens * If both AT_UID and AT_GID are set then take_owner and 2651fa9e4066Sahrens * take_group must both be set in order to allow taking 2652fa9e4066Sahrens * ownership. 2653fa9e4066Sahrens * 2654fa9e4066Sahrens * Otherwise, send the check through secpolicy_vnode_setattr() 2655fa9e4066Sahrens * 2656fa9e4066Sahrens */ 2657fa9e4066Sahrens 2658fa9e4066Sahrens if (((idmask == (AT_UID|AT_GID)) && take_owner && take_group) || 2659fa9e4066Sahrens ((idmask == AT_UID) && take_owner) || 2660fa9e4066Sahrens ((idmask == AT_GID) && take_group)) { 2661da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_OWNER, 0, 2662da6c28aaSamw skipaclchk, cr) == 0) { 2663fa9e4066Sahrens /* 2664fa9e4066Sahrens * Remove setuid/setgid for non-privileged users 2665fa9e4066Sahrens */ 266613f9f30eSmarks secpolicy_setid_clear(vap, cr); 2667f92daba9Smarks trim_mask = (mask & (AT_UID|AT_GID)); 2668fa9e4066Sahrens } else { 2669fa9e4066Sahrens need_policy = TRUE; 2670fa9e4066Sahrens } 2671fa9e4066Sahrens } else { 2672fa9e4066Sahrens need_policy = TRUE; 2673fa9e4066Sahrens } 2674fa9e4066Sahrens } 2675fa9e4066Sahrens 2676f92daba9Smarks mutex_enter(&zp->z_lock); 2677f92daba9Smarks oldva.va_mode = pzp->zp_mode; 2678bda89588Sjp zfs_fuid_map_ids(zp, cr, &oldva.va_uid, &oldva.va_gid); 2679da6c28aaSamw if (mask & AT_XVATTR) { 2680ae4caef8SMark Shellenbaum /* 2681ae4caef8SMark Shellenbaum * Update xvattr mask to include only those attributes 2682ae4caef8SMark Shellenbaum * that are actually changing. 2683ae4caef8SMark Shellenbaum * 2684ae4caef8SMark Shellenbaum * the bits will be restored prior to actually setting 2685ae4caef8SMark Shellenbaum * the attributes so the caller thinks they were set. 2686ae4caef8SMark Shellenbaum */ 2687ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_APPENDONLY)) { 2688ae4caef8SMark Shellenbaum if (xoap->xoa_appendonly != 2689ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_APPENDONLY) != 0)) { 2690ae4caef8SMark Shellenbaum need_policy = TRUE; 2691ae4caef8SMark Shellenbaum } else { 2692ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_APPENDONLY); 2693ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_APPENDONLY); 2694ae4caef8SMark Shellenbaum } 2695ae4caef8SMark Shellenbaum } 2696ae4caef8SMark Shellenbaum 2697ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NOUNLINK)) { 2698ae4caef8SMark Shellenbaum if (xoap->xoa_nounlink != 2699ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NOUNLINK) != 0)) { 2700ae4caef8SMark Shellenbaum need_policy = TRUE; 2701ae4caef8SMark Shellenbaum } else { 2702ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NOUNLINK); 2703ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NOUNLINK); 2704ae4caef8SMark Shellenbaum } 2705ae4caef8SMark Shellenbaum } 2706ae4caef8SMark Shellenbaum 2707ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_IMMUTABLE)) { 2708ae4caef8SMark Shellenbaum if (xoap->xoa_immutable != 2709ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_IMMUTABLE) != 0)) { 2710ae4caef8SMark Shellenbaum need_policy = TRUE; 2711ae4caef8SMark Shellenbaum } else { 2712ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_IMMUTABLE); 2713ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_IMMUTABLE); 2714ae4caef8SMark Shellenbaum } 2715ae4caef8SMark Shellenbaum } 2716ae4caef8SMark Shellenbaum 2717ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_NODUMP)) { 2718ae4caef8SMark Shellenbaum if (xoap->xoa_nodump != 2719ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_NODUMP) != 0)) { 2720ae4caef8SMark Shellenbaum need_policy = TRUE; 2721ae4caef8SMark Shellenbaum } else { 2722ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_NODUMP); 2723ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_NODUMP); 2724ae4caef8SMark Shellenbaum } 2725ae4caef8SMark Shellenbaum } 2726ae4caef8SMark Shellenbaum 2727ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_MODIFIED)) { 2728ae4caef8SMark Shellenbaum if (xoap->xoa_av_modified != 2729ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_MODIFIED) != 0)) { 2730ae4caef8SMark Shellenbaum need_policy = TRUE; 2731ae4caef8SMark Shellenbaum } else { 2732ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_MODIFIED); 2733ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_MODIFIED); 2734ae4caef8SMark Shellenbaum } 2735ae4caef8SMark Shellenbaum } 2736ae4caef8SMark Shellenbaum 2737ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(xvap, XAT_AV_QUARANTINED)) { 2738ae4caef8SMark Shellenbaum if ((vp->v_type != VREG && 2739ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined) || 2740ae4caef8SMark Shellenbaum xoap->xoa_av_quarantined != 2741ae4caef8SMark Shellenbaum ((pzp->zp_flags & ZFS_AV_QUARANTINED) != 0)) { 2742ae4caef8SMark Shellenbaum need_policy = TRUE; 2743ae4caef8SMark Shellenbaum } else { 2744ae4caef8SMark Shellenbaum XVA_CLR_REQ(xvap, XAT_AV_QUARANTINED); 2745ae4caef8SMark Shellenbaum XVA_SET_REQ(&tmpxvattr, XAT_AV_QUARANTINED); 2746ae4caef8SMark Shellenbaum } 2747ae4caef8SMark Shellenbaum } 2748ae4caef8SMark Shellenbaum 27497a286c47SDai Ngo if (XVA_ISSET_REQ(xvap, XAT_REPARSE)) { 27507a286c47SDai Ngo mutex_exit(&zp->z_lock); 27517a286c47SDai Ngo ZFS_EXIT(zfsvfs); 27527a286c47SDai Ngo return (EPERM); 27537a286c47SDai Ngo } 27547a286c47SDai Ngo 2755ae4caef8SMark Shellenbaum if (need_policy == FALSE && 2756ae4caef8SMark Shellenbaum (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP) || 2757ae4caef8SMark Shellenbaum XVA_ISSET_REQ(xvap, XAT_OPAQUE))) { 2758da6c28aaSamw need_policy = TRUE; 2759da6c28aaSamw } 2760da6c28aaSamw } 2761da6c28aaSamw 2762f92daba9Smarks mutex_exit(&zp->z_lock); 2763fa9e4066Sahrens 2764f92daba9Smarks if (mask & AT_MODE) { 2765da6c28aaSamw if (zfs_zaccess(zp, ACE_WRITE_ACL, 0, skipaclchk, cr) == 0) { 2766f92daba9Smarks err = secpolicy_setid_setsticky_clear(vp, vap, 2767f92daba9Smarks &oldva, cr); 2768f92daba9Smarks if (err) { 2769f92daba9Smarks ZFS_EXIT(zfsvfs); 2770f92daba9Smarks return (err); 2771f92daba9Smarks } 2772f92daba9Smarks trim_mask |= AT_MODE; 2773f92daba9Smarks } else { 2774f92daba9Smarks need_policy = TRUE; 2775f92daba9Smarks } 2776f92daba9Smarks } 277713f9f30eSmarks 2778f92daba9Smarks if (need_policy) { 277913f9f30eSmarks /* 278013f9f30eSmarks * If trim_mask is set then take ownership 2781f92daba9Smarks * has been granted or write_acl is present and user 2782f92daba9Smarks * has the ability to modify mode. In that case remove 2783f92daba9Smarks * UID|GID and or MODE from mask so that 278413f9f30eSmarks * secpolicy_vnode_setattr() doesn't revoke it. 278513f9f30eSmarks */ 278613f9f30eSmarks 2787f92daba9Smarks if (trim_mask) { 2788f92daba9Smarks saved_mask = vap->va_mask; 2789f92daba9Smarks vap->va_mask &= ~trim_mask; 2790f92daba9Smarks } 2791fa9e4066Sahrens err = secpolicy_vnode_setattr(cr, vp, vap, &oldva, flags, 2792da6c28aaSamw (int (*)(void *, int, cred_t *))zfs_zaccess_unix, zp); 2793fa9e4066Sahrens if (err) { 2794fa9e4066Sahrens ZFS_EXIT(zfsvfs); 2795fa9e4066Sahrens return (err); 2796fa9e4066Sahrens } 279713f9f30eSmarks 279813f9f30eSmarks if (trim_mask) 2799f92daba9Smarks vap->va_mask |= saved_mask; 2800fa9e4066Sahrens } 2801fa9e4066Sahrens 2802fa9e4066Sahrens /* 2803fa9e4066Sahrens * secpolicy_vnode_setattr, or take ownership may have 2804fa9e4066Sahrens * changed va_mask 2805fa9e4066Sahrens */ 2806fa9e4066Sahrens mask = vap->va_mask; 2807fa9e4066Sahrens 2808fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 2809fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 2810fa9e4066Sahrens 2811fa9e4066Sahrens if (mask & AT_MODE) { 2812169cdae2Smarks uint64_t pmode = pzp->zp_mode; 2813fa9e4066Sahrens 2814169cdae2Smarks new_mode = (pmode & S_IFMT) | (vap->va_mode & ~S_IFMT); 2815fa9e4066Sahrens 281614843421SMatthew Ahrens if (err = zfs_acl_chmod_setattr(zp, &aclp, new_mode)) 281714843421SMatthew Ahrens goto out; 2818da6c28aaSamw if (pzp->zp_acl.z_acl_extern_obj) { 2819da6c28aaSamw /* Are we upgrading ACL from old V0 format to new V1 */ 2820da6c28aaSamw if (zfsvfs->z_version <= ZPL_VERSION_FUID && 2821da6c28aaSamw pzp->zp_acl.z_acl_version == 2822da6c28aaSamw ZFS_ACL_VERSION_INITIAL) { 2823da6c28aaSamw dmu_tx_hold_free(tx, 2824da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 2825da6c28aaSamw DMU_OBJECT_END); 2826da6c28aaSamw dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 28274c841f60Smarks 0, aclp->z_acl_bytes); 2828da6c28aaSamw } else { 2829da6c28aaSamw dmu_tx_hold_write(tx, 2830da6c28aaSamw pzp->zp_acl.z_acl_extern_obj, 0, 28314c841f60Smarks aclp->z_acl_bytes); 28324c841f60Smarks } 28336d38e247Smarks } else if (aclp->z_acl_bytes > ZFS_ACE_SPACE) { 28346d38e247Smarks dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 28356d38e247Smarks 0, aclp->z_acl_bytes); 2836da6c28aaSamw } 2837fa9e4066Sahrens } 2838fa9e4066Sahrens 283989459e17SMark Shellenbaum if (mask & (AT_UID | AT_GID)) { 284089459e17SMark Shellenbaum if (pzp->zp_xattr) { 284189459e17SMark Shellenbaum err = zfs_zget(zp->z_zfsvfs, pzp->zp_xattr, &attrzp); 284214843421SMatthew Ahrens if (err) 284314843421SMatthew Ahrens goto out; 284489459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, attrzp->z_id); 284589459e17SMark Shellenbaum } 284689459e17SMark Shellenbaum if (mask & AT_UID) { 284789459e17SMark Shellenbaum new_uid = zfs_fuid_create(zfsvfs, 284889459e17SMark Shellenbaum (uint64_t)vap->va_uid, cr, ZFS_OWNER, &fuidp); 284914843421SMatthew Ahrens if (new_uid != pzp->zp_uid && 285014843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_FALSE, new_uid)) { 285114843421SMatthew Ahrens err = EDQUOT; 285214843421SMatthew Ahrens goto out; 285314843421SMatthew Ahrens } 285489459e17SMark Shellenbaum } 285514843421SMatthew Ahrens 285689459e17SMark Shellenbaum if (mask & AT_GID) { 285789459e17SMark Shellenbaum new_gid = zfs_fuid_create(zfsvfs, (uint64_t)vap->va_gid, 285889459e17SMark Shellenbaum cr, ZFS_GROUP, &fuidp); 285914843421SMatthew Ahrens if (new_gid != pzp->zp_gid && 286014843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_TRUE, new_gid)) { 286114843421SMatthew Ahrens err = EDQUOT; 286214843421SMatthew Ahrens goto out; 286314843421SMatthew Ahrens } 286489459e17SMark Shellenbaum } 286589459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 286689459e17SMark Shellenbaum if (fuid_dirtied) { 286789459e17SMark Shellenbaum if (zfsvfs->z_fuid_obj == 0) { 286889459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, DMU_NEW_OBJECT); 286989459e17SMark Shellenbaum dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, 287089459e17SMark Shellenbaum FUID_SIZE_ESTIMATE(zfsvfs)); 287189459e17SMark Shellenbaum dmu_tx_hold_zap(tx, MASTER_NODE_OBJ, 287289459e17SMark Shellenbaum FALSE, NULL); 287389459e17SMark Shellenbaum } else { 287489459e17SMark Shellenbaum dmu_tx_hold_bonus(tx, zfsvfs->z_fuid_obj); 287589459e17SMark Shellenbaum dmu_tx_hold_write(tx, zfsvfs->z_fuid_obj, 0, 287689459e17SMark Shellenbaum FUID_SIZE_ESTIMATE(zfsvfs)); 287789459e17SMark Shellenbaum } 2878d2443e76Smarks } 2879d2443e76Smarks } 2880d2443e76Smarks 28811209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 2882fa9e4066Sahrens if (err) { 288314843421SMatthew Ahrens if (err == ERESTART) 28848a2f1b91Sahrens dmu_tx_wait(tx); 288514843421SMatthew Ahrens goto out; 2886fa9e4066Sahrens } 2887fa9e4066Sahrens 2888fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 2889fa9e4066Sahrens 2890fa9e4066Sahrens /* 2891fa9e4066Sahrens * Set each attribute requested. 2892fa9e4066Sahrens * We group settings according to the locks they need to acquire. 2893fa9e4066Sahrens * 2894fa9e4066Sahrens * Note: you cannot set ctime directly, although it will be 2895fa9e4066Sahrens * updated as a side-effect of calling this function. 2896fa9e4066Sahrens */ 2897fa9e4066Sahrens 2898fa9e4066Sahrens mutex_enter(&zp->z_lock); 2899fa9e4066Sahrens 2900fa9e4066Sahrens if (mask & AT_MODE) { 29014c841f60Smarks mutex_enter(&zp->z_acl_lock); 29024c841f60Smarks zp->z_phys->zp_mode = new_mode; 290389459e17SMark Shellenbaum err = zfs_aclset_common(zp, aclp, cr, tx); 2904fa9e4066Sahrens ASSERT3U(err, ==, 0); 29054929fd5eSTim Haley zp->z_acl_cached = aclp; 29064929fd5eSTim Haley aclp = NULL; 29074c841f60Smarks mutex_exit(&zp->z_acl_lock); 2908fa9e4066Sahrens } 2909fa9e4066Sahrens 2910d2443e76Smarks if (attrzp) 2911d2443e76Smarks mutex_enter(&attrzp->z_lock); 2912d2443e76Smarks 2913d2443e76Smarks if (mask & AT_UID) { 291489459e17SMark Shellenbaum pzp->zp_uid = new_uid; 291589459e17SMark Shellenbaum if (attrzp) 291689459e17SMark Shellenbaum attrzp->z_phys->zp_uid = new_uid; 2917d2443e76Smarks } 2918fa9e4066Sahrens 2919d2443e76Smarks if (mask & AT_GID) { 292089459e17SMark Shellenbaum pzp->zp_gid = new_gid; 2921d2443e76Smarks if (attrzp) 292289459e17SMark Shellenbaum attrzp->z_phys->zp_gid = new_gid; 2923d2443e76Smarks } 2924d2443e76Smarks 2925d2443e76Smarks if (attrzp) 2926d2443e76Smarks mutex_exit(&attrzp->z_lock); 2927fa9e4066Sahrens 2928fa9e4066Sahrens if (mask & AT_ATIME) 2929fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_atime, pzp->zp_atime); 2930fa9e4066Sahrens 2931fa9e4066Sahrens if (mask & AT_MTIME) 2932fa9e4066Sahrens ZFS_TIME_ENCODE(&vap->va_mtime, pzp->zp_mtime); 2933fa9e4066Sahrens 2934cdb0ab79Smaybee /* XXX - shouldn't this be done *before* the ATIME/MTIME checks? */ 29355730cc9aSmaybee if (mask & AT_SIZE) 2936fa9e4066Sahrens zfs_time_stamper_locked(zp, CONTENT_MODIFIED, tx); 29375730cc9aSmaybee else if (mask != 0) 2938fa9e4066Sahrens zfs_time_stamper_locked(zp, STATE_CHANGED, tx); 2939da6c28aaSamw /* 2940da6c28aaSamw * Do this after setting timestamps to prevent timestamp 2941da6c28aaSamw * update from toggling bit 2942da6c28aaSamw */ 2943da6c28aaSamw 2944da6c28aaSamw if (xoap && (mask & AT_XVATTR)) { 2945ae4caef8SMark Shellenbaum 2946ae4caef8SMark Shellenbaum /* 2947ae4caef8SMark Shellenbaum * restore trimmed off masks 2948ae4caef8SMark Shellenbaum * so that return masks can be set for caller. 2949ae4caef8SMark Shellenbaum */ 2950ae4caef8SMark Shellenbaum 2951ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_APPENDONLY)) { 2952ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_APPENDONLY); 2953ae4caef8SMark Shellenbaum } 2954ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NOUNLINK)) { 2955ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NOUNLINK); 2956ae4caef8SMark Shellenbaum } 2957ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_IMMUTABLE)) { 2958ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_IMMUTABLE); 2959ae4caef8SMark Shellenbaum } 2960ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_NODUMP)) { 2961ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_NODUMP); 2962ae4caef8SMark Shellenbaum } 2963ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_MODIFIED)) { 2964ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_MODIFIED); 2965ae4caef8SMark Shellenbaum } 2966ae4caef8SMark Shellenbaum if (XVA_ISSET_REQ(&tmpxvattr, XAT_AV_QUARANTINED)) { 2967ae4caef8SMark Shellenbaum XVA_SET_REQ(xvap, XAT_AV_QUARANTINED); 2968ae4caef8SMark Shellenbaum } 2969ae4caef8SMark Shellenbaum 2970da6c28aaSamw if (XVA_ISSET_REQ(xvap, XAT_AV_SCANSTAMP)) { 2971da6c28aaSamw size_t len; 2972da6c28aaSamw dmu_object_info_t doi; 2973da6c28aaSamw 2974da6c28aaSamw ASSERT(vp->v_type == VREG); 2975da6c28aaSamw 2976da6c28aaSamw /* Grow the bonus buffer if necessary. */ 2977da6c28aaSamw dmu_object_info_from_db(zp->z_dbuf, &doi); 2978da6c28aaSamw len = sizeof (xoap->xoa_av_scanstamp) + 2979da6c28aaSamw sizeof (znode_phys_t); 2980da6c28aaSamw if (len > doi.doi_bonus_size) 2981da6c28aaSamw VERIFY(dmu_set_bonus(zp->z_dbuf, len, tx) == 0); 2982da6c28aaSamw } 2983da6c28aaSamw zfs_xvattr_set(zp, xvap); 2984da6c28aaSamw } 2985fa9e4066Sahrens 298689459e17SMark Shellenbaum if (fuid_dirtied) 298789459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 298889459e17SMark Shellenbaum 29895730cc9aSmaybee if (mask != 0) 2990da6c28aaSamw zfs_log_setattr(zilog, tx, TX_SETATTR, zp, vap, mask, fuidp); 2991fa9e4066Sahrens 2992fa9e4066Sahrens mutex_exit(&zp->z_lock); 2993fa9e4066Sahrens 299414843421SMatthew Ahrens out: 2995d2443e76Smarks if (attrzp) 2996d2443e76Smarks VN_RELE(ZTOV(attrzp)); 2997d2443e76Smarks 29984929fd5eSTim Haley if (aclp) 29994929fd5eSTim Haley zfs_acl_free(aclp); 30004929fd5eSTim Haley 300114843421SMatthew Ahrens if (fuidp) { 300214843421SMatthew Ahrens zfs_fuid_info_free(fuidp); 300314843421SMatthew Ahrens fuidp = NULL; 300414843421SMatthew Ahrens } 300514843421SMatthew Ahrens 300614843421SMatthew Ahrens if (err) 300714843421SMatthew Ahrens dmu_tx_abort(tx); 300814843421SMatthew Ahrens else 300914843421SMatthew Ahrens dmu_tx_commit(tx); 301014843421SMatthew Ahrens 301114843421SMatthew Ahrens if (err == ERESTART) 301214843421SMatthew Ahrens goto top; 3013fa9e4066Sahrens 3014fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3015fa9e4066Sahrens return (err); 3016fa9e4066Sahrens } 3017fa9e4066Sahrens 3018fa9e4066Sahrens typedef struct zfs_zlock { 3019fa9e4066Sahrens krwlock_t *zl_rwlock; /* lock we acquired */ 3020fa9e4066Sahrens znode_t *zl_znode; /* znode we held */ 3021fa9e4066Sahrens struct zfs_zlock *zl_next; /* next in list */ 3022fa9e4066Sahrens } zfs_zlock_t; 3023fa9e4066Sahrens 3024ff008e00Smaybee /* 3025ff008e00Smaybee * Drop locks and release vnodes that were held by zfs_rename_lock(). 3026ff008e00Smaybee */ 3027ff008e00Smaybee static void 3028ff008e00Smaybee zfs_rename_unlock(zfs_zlock_t **zlpp) 3029ff008e00Smaybee { 3030ff008e00Smaybee zfs_zlock_t *zl; 3031ff008e00Smaybee 3032ff008e00Smaybee while ((zl = *zlpp) != NULL) { 3033ff008e00Smaybee if (zl->zl_znode != NULL) 3034ff008e00Smaybee VN_RELE(ZTOV(zl->zl_znode)); 3035ff008e00Smaybee rw_exit(zl->zl_rwlock); 3036ff008e00Smaybee *zlpp = zl->zl_next; 3037ff008e00Smaybee kmem_free(zl, sizeof (*zl)); 3038ff008e00Smaybee } 3039ff008e00Smaybee } 3040ff008e00Smaybee 3041ff008e00Smaybee /* 3042ff008e00Smaybee * Search back through the directory tree, using the ".." entries. 3043ff008e00Smaybee * Lock each directory in the chain to prevent concurrent renames. 3044ff008e00Smaybee * Fail any attempt to move a directory into one of its own descendants. 3045ff008e00Smaybee * XXX - z_parent_lock can overlap with map or grow locks 3046ff008e00Smaybee */ 3047fa9e4066Sahrens static int 3048fa9e4066Sahrens zfs_rename_lock(znode_t *szp, znode_t *tdzp, znode_t *sdzp, zfs_zlock_t **zlpp) 3049fa9e4066Sahrens { 3050fa9e4066Sahrens zfs_zlock_t *zl; 3051feb08c6bSbillm znode_t *zp = tdzp; 3052fa9e4066Sahrens uint64_t rootid = zp->z_zfsvfs->z_root; 3053fa9e4066Sahrens uint64_t *oidp = &zp->z_id; 3054fa9e4066Sahrens krwlock_t *rwlp = &szp->z_parent_lock; 3055fa9e4066Sahrens krw_t rw = RW_WRITER; 3056fa9e4066Sahrens 3057fa9e4066Sahrens /* 3058fa9e4066Sahrens * First pass write-locks szp and compares to zp->z_id. 3059fa9e4066Sahrens * Later passes read-lock zp and compare to zp->z_parent. 3060fa9e4066Sahrens */ 3061fa9e4066Sahrens do { 3062ff008e00Smaybee if (!rw_tryenter(rwlp, rw)) { 3063ff008e00Smaybee /* 3064ff008e00Smaybee * Another thread is renaming in this path. 3065ff008e00Smaybee * Note that if we are a WRITER, we don't have any 3066ff008e00Smaybee * parent_locks held yet. 3067ff008e00Smaybee */ 3068ff008e00Smaybee if (rw == RW_READER && zp->z_id > szp->z_id) { 3069ff008e00Smaybee /* 3070ff008e00Smaybee * Drop our locks and restart 3071ff008e00Smaybee */ 3072ff008e00Smaybee zfs_rename_unlock(&zl); 3073ff008e00Smaybee *zlpp = NULL; 3074ff008e00Smaybee zp = tdzp; 3075ff008e00Smaybee oidp = &zp->z_id; 3076ff008e00Smaybee rwlp = &szp->z_parent_lock; 3077ff008e00Smaybee rw = RW_WRITER; 3078ff008e00Smaybee continue; 3079ff008e00Smaybee } else { 3080ff008e00Smaybee /* 3081ff008e00Smaybee * Wait for other thread to drop its locks 3082ff008e00Smaybee */ 3083ff008e00Smaybee rw_enter(rwlp, rw); 3084ff008e00Smaybee } 3085ff008e00Smaybee } 3086ff008e00Smaybee 3087fa9e4066Sahrens zl = kmem_alloc(sizeof (*zl), KM_SLEEP); 3088fa9e4066Sahrens zl->zl_rwlock = rwlp; 3089fa9e4066Sahrens zl->zl_znode = NULL; 3090fa9e4066Sahrens zl->zl_next = *zlpp; 3091fa9e4066Sahrens *zlpp = zl; 3092fa9e4066Sahrens 3093fa9e4066Sahrens if (*oidp == szp->z_id) /* We're a descendant of szp */ 3094fa9e4066Sahrens return (EINVAL); 3095fa9e4066Sahrens 3096fa9e4066Sahrens if (*oidp == rootid) /* We've hit the top */ 3097fa9e4066Sahrens return (0); 3098fa9e4066Sahrens 3099fa9e4066Sahrens if (rw == RW_READER) { /* i.e. not the first pass */ 3100fa9e4066Sahrens int error = zfs_zget(zp->z_zfsvfs, *oidp, &zp); 3101fa9e4066Sahrens if (error) 3102fa9e4066Sahrens return (error); 3103fa9e4066Sahrens zl->zl_znode = zp; 3104fa9e4066Sahrens } 3105fa9e4066Sahrens oidp = &zp->z_phys->zp_parent; 3106fa9e4066Sahrens rwlp = &zp->z_parent_lock; 3107fa9e4066Sahrens rw = RW_READER; 3108fa9e4066Sahrens 3109fa9e4066Sahrens } while (zp->z_id != sdzp->z_id); 3110fa9e4066Sahrens 3111fa9e4066Sahrens return (0); 3112fa9e4066Sahrens } 3113fa9e4066Sahrens 3114fa9e4066Sahrens /* 3115fa9e4066Sahrens * Move an entry from the provided source directory to the target 3116fa9e4066Sahrens * directory. Change the entry name as indicated. 3117fa9e4066Sahrens * 3118fa9e4066Sahrens * IN: sdvp - Source directory containing the "old entry". 3119fa9e4066Sahrens * snm - Old entry name. 3120fa9e4066Sahrens * tdvp - Target directory to contain the "new entry". 3121fa9e4066Sahrens * tnm - New entry name. 3122fa9e4066Sahrens * cr - credentials of caller. 3123da6c28aaSamw * ct - caller context 3124da6c28aaSamw * flags - case flags 3125fa9e4066Sahrens * 3126fa9e4066Sahrens * RETURN: 0 if success 3127fa9e4066Sahrens * error code if failure 3128fa9e4066Sahrens * 3129fa9e4066Sahrens * Timestamps: 3130fa9e4066Sahrens * sdvp,tdvp - ctime|mtime updated 3131fa9e4066Sahrens */ 3132da6c28aaSamw /*ARGSUSED*/ 3133fa9e4066Sahrens static int 3134da6c28aaSamw zfs_rename(vnode_t *sdvp, char *snm, vnode_t *tdvp, char *tnm, cred_t *cr, 3135da6c28aaSamw caller_context_t *ct, int flags) 3136fa9e4066Sahrens { 3137fa9e4066Sahrens znode_t *tdzp, *szp, *tzp; 3138fa9e4066Sahrens znode_t *sdzp = VTOZ(sdvp); 3139fa9e4066Sahrens zfsvfs_t *zfsvfs = sdzp->z_zfsvfs; 3140f18faf3fSek zilog_t *zilog; 3141fa9e4066Sahrens vnode_t *realvp; 3142fa9e4066Sahrens zfs_dirlock_t *sdl, *tdl; 3143fa9e4066Sahrens dmu_tx_t *tx; 3144fa9e4066Sahrens zfs_zlock_t *zl; 3145da6c28aaSamw int cmp, serr, terr; 3146da6c28aaSamw int error = 0; 3147da6c28aaSamw int zflg = 0; 3148fa9e4066Sahrens 31493cb34c60Sahrens ZFS_ENTER(zfsvfs); 31503cb34c60Sahrens ZFS_VERIFY_ZP(sdzp); 3151f18faf3fSek zilog = zfsvfs->z_log; 3152fa9e4066Sahrens 3153fa9e4066Sahrens /* 3154fa9e4066Sahrens * Make sure we have the real vp for the target directory. 3155fa9e4066Sahrens */ 3156da6c28aaSamw if (VOP_REALVP(tdvp, &realvp, ct) == 0) 3157fa9e4066Sahrens tdvp = realvp; 3158fa9e4066Sahrens 3159fa9e4066Sahrens if (tdvp->v_vfsp != sdvp->v_vfsp) { 3160fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3161fa9e4066Sahrens return (EXDEV); 3162fa9e4066Sahrens } 3163fa9e4066Sahrens 3164fa9e4066Sahrens tdzp = VTOZ(tdvp); 31653cb34c60Sahrens ZFS_VERIFY_ZP(tdzp); 3166de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(tnm, 3167da6c28aaSamw strlen(tnm), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3168da6c28aaSamw ZFS_EXIT(zfsvfs); 3169da6c28aaSamw return (EILSEQ); 3170da6c28aaSamw } 3171da6c28aaSamw 3172da6c28aaSamw if (flags & FIGNORECASE) 3173da6c28aaSamw zflg |= ZCILOOK; 3174da6c28aaSamw 3175fa9e4066Sahrens top: 3176fa9e4066Sahrens szp = NULL; 3177fa9e4066Sahrens tzp = NULL; 3178fa9e4066Sahrens zl = NULL; 3179fa9e4066Sahrens 3180fa9e4066Sahrens /* 3181fa9e4066Sahrens * This is to prevent the creation of links into attribute space 3182fa9e4066Sahrens * by renaming a linked file into/outof an attribute directory. 3183fa9e4066Sahrens * See the comment in zfs_link() for why this is considered bad. 3184fa9e4066Sahrens */ 3185fa9e4066Sahrens if ((tdzp->z_phys->zp_flags & ZFS_XATTR) != 3186fa9e4066Sahrens (sdzp->z_phys->zp_flags & ZFS_XATTR)) { 3187fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3188fa9e4066Sahrens return (EINVAL); 3189fa9e4066Sahrens } 3190fa9e4066Sahrens 3191fa9e4066Sahrens /* 3192fa9e4066Sahrens * Lock source and target directory entries. To prevent deadlock, 3193fa9e4066Sahrens * a lock ordering must be defined. We lock the directory with 3194fa9e4066Sahrens * the smallest object id first, or if it's a tie, the one with 3195fa9e4066Sahrens * the lexically first name. 3196fa9e4066Sahrens */ 3197fa9e4066Sahrens if (sdzp->z_id < tdzp->z_id) { 3198fa9e4066Sahrens cmp = -1; 3199fa9e4066Sahrens } else if (sdzp->z_id > tdzp->z_id) { 3200fa9e4066Sahrens cmp = 1; 3201fa9e4066Sahrens } else { 3202da6c28aaSamw /* 3203da6c28aaSamw * First compare the two name arguments without 3204da6c28aaSamw * considering any case folding. 3205da6c28aaSamw */ 3206da6c28aaSamw int nofold = (zfsvfs->z_norm & ~U8_TEXTPREP_TOUPPER); 3207da6c28aaSamw 3208da6c28aaSamw cmp = u8_strcmp(snm, tnm, 0, nofold, U8_UNICODE_LATEST, &error); 3209de8267e0Stimh ASSERT(error == 0 || !zfsvfs->z_utf8); 3210fa9e4066Sahrens if (cmp == 0) { 3211fa9e4066Sahrens /* 3212fa9e4066Sahrens * POSIX: "If the old argument and the new argument 3213fa9e4066Sahrens * both refer to links to the same existing file, 3214fa9e4066Sahrens * the rename() function shall return successfully 3215fa9e4066Sahrens * and perform no other action." 3216fa9e4066Sahrens */ 3217fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3218fa9e4066Sahrens return (0); 3219fa9e4066Sahrens } 3220da6c28aaSamw /* 3221da6c28aaSamw * If the file system is case-folding, then we may 3222da6c28aaSamw * have some more checking to do. A case-folding file 3223da6c28aaSamw * system is either supporting mixed case sensitivity 3224da6c28aaSamw * access or is completely case-insensitive. Note 3225da6c28aaSamw * that the file system is always case preserving. 3226da6c28aaSamw * 3227da6c28aaSamw * In mixed sensitivity mode case sensitive behavior 3228da6c28aaSamw * is the default. FIGNORECASE must be used to 3229da6c28aaSamw * explicitly request case insensitive behavior. 3230da6c28aaSamw * 3231da6c28aaSamw * If the source and target names provided differ only 3232da6c28aaSamw * by case (e.g., a request to rename 'tim' to 'Tim'), 3233da6c28aaSamw * we will treat this as a special case in the 3234da6c28aaSamw * case-insensitive mode: as long as the source name 3235da6c28aaSamw * is an exact match, we will allow this to proceed as 3236da6c28aaSamw * a name-change request. 3237da6c28aaSamw */ 3238de8267e0Stimh if ((zfsvfs->z_case == ZFS_CASE_INSENSITIVE || 3239de8267e0Stimh (zfsvfs->z_case == ZFS_CASE_MIXED && 3240de8267e0Stimh flags & FIGNORECASE)) && 3241da6c28aaSamw u8_strcmp(snm, tnm, 0, zfsvfs->z_norm, U8_UNICODE_LATEST, 3242da6c28aaSamw &error) == 0) { 3243da6c28aaSamw /* 3244da6c28aaSamw * case preserving rename request, require exact 3245da6c28aaSamw * name matches 3246da6c28aaSamw */ 3247da6c28aaSamw zflg |= ZCIEXACT; 3248da6c28aaSamw zflg &= ~ZCILOOK; 3249da6c28aaSamw } 3250fa9e4066Sahrens } 3251da6c28aaSamw 3252afefc7e4SSanjeev Bagewadi /* 3253afefc7e4SSanjeev Bagewadi * If the source and destination directories are the same, we should 3254afefc7e4SSanjeev Bagewadi * grab the z_name_lock of that directory only once. 3255afefc7e4SSanjeev Bagewadi */ 3256afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) { 3257afefc7e4SSanjeev Bagewadi zflg |= ZHAVELOCK; 3258afefc7e4SSanjeev Bagewadi rw_enter(&sdzp->z_name_lock, RW_READER); 3259afefc7e4SSanjeev Bagewadi } 3260afefc7e4SSanjeev Bagewadi 3261fa9e4066Sahrens if (cmp < 0) { 3262da6c28aaSamw serr = zfs_dirent_lock(&sdl, sdzp, snm, &szp, 3263da6c28aaSamw ZEXISTS | zflg, NULL, NULL); 3264da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3265da6c28aaSamw tdzp, tnm, &tzp, ZRENAMING | zflg, NULL, NULL); 3266fa9e4066Sahrens } else { 3267da6c28aaSamw terr = zfs_dirent_lock(&tdl, 3268da6c28aaSamw tdzp, tnm, &tzp, zflg, NULL, NULL); 3269da6c28aaSamw serr = zfs_dirent_lock(&sdl, 3270da6c28aaSamw sdzp, snm, &szp, ZEXISTS | ZRENAMING | zflg, 3271da6c28aaSamw NULL, NULL); 3272fa9e4066Sahrens } 3273fa9e4066Sahrens 3274fa9e4066Sahrens if (serr) { 3275fa9e4066Sahrens /* 3276fa9e4066Sahrens * Source entry invalid or not there. 3277fa9e4066Sahrens */ 3278fa9e4066Sahrens if (!terr) { 3279fa9e4066Sahrens zfs_dirent_unlock(tdl); 3280fa9e4066Sahrens if (tzp) 3281fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3282fa9e4066Sahrens } 3283afefc7e4SSanjeev Bagewadi 3284afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3285afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3286afefc7e4SSanjeev Bagewadi 3287fa9e4066Sahrens if (strcmp(snm, "..") == 0) 3288fa9e4066Sahrens serr = EINVAL; 3289fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3290fa9e4066Sahrens return (serr); 3291fa9e4066Sahrens } 3292fa9e4066Sahrens if (terr) { 3293fa9e4066Sahrens zfs_dirent_unlock(sdl); 3294fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3295afefc7e4SSanjeev Bagewadi 3296afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3297afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3298afefc7e4SSanjeev Bagewadi 3299fa9e4066Sahrens if (strcmp(tnm, "..") == 0) 3300fa9e4066Sahrens terr = EINVAL; 3301fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3302fa9e4066Sahrens return (terr); 3303fa9e4066Sahrens } 3304fa9e4066Sahrens 3305fa9e4066Sahrens /* 3306fa9e4066Sahrens * Must have write access at the source to remove the old entry 3307fa9e4066Sahrens * and write access at the target to create the new entry. 3308fa9e4066Sahrens * Note that if target and source are the same, this can be 3309fa9e4066Sahrens * done in a single check. 3310fa9e4066Sahrens */ 3311fa9e4066Sahrens 3312fa9e4066Sahrens if (error = zfs_zaccess_rename(sdzp, szp, tdzp, tzp, cr)) 3313fa9e4066Sahrens goto out; 3314fa9e4066Sahrens 3315fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3316fa9e4066Sahrens /* 3317fa9e4066Sahrens * Check to make sure rename is valid. 3318fa9e4066Sahrens * Can't do a move like this: /usr/a/b to /usr/a/b/c/d 3319fa9e4066Sahrens */ 3320fa9e4066Sahrens if (error = zfs_rename_lock(szp, tdzp, sdzp, &zl)) 3321fa9e4066Sahrens goto out; 3322fa9e4066Sahrens } 3323fa9e4066Sahrens 3324fa9e4066Sahrens /* 3325fa9e4066Sahrens * Does target exist? 3326fa9e4066Sahrens */ 3327fa9e4066Sahrens if (tzp) { 3328fa9e4066Sahrens /* 3329fa9e4066Sahrens * Source and target must be the same type. 3330fa9e4066Sahrens */ 3331fa9e4066Sahrens if (ZTOV(szp)->v_type == VDIR) { 3332fa9e4066Sahrens if (ZTOV(tzp)->v_type != VDIR) { 3333fa9e4066Sahrens error = ENOTDIR; 3334fa9e4066Sahrens goto out; 3335fa9e4066Sahrens } 3336fa9e4066Sahrens } else { 3337fa9e4066Sahrens if (ZTOV(tzp)->v_type == VDIR) { 3338fa9e4066Sahrens error = EISDIR; 3339fa9e4066Sahrens goto out; 3340fa9e4066Sahrens } 3341fa9e4066Sahrens } 3342fa9e4066Sahrens /* 3343fa9e4066Sahrens * POSIX dictates that when the source and target 3344fa9e4066Sahrens * entries refer to the same file object, rename 3345fa9e4066Sahrens * must do nothing and exit without error. 3346fa9e4066Sahrens */ 3347fa9e4066Sahrens if (szp->z_id == tzp->z_id) { 3348fa9e4066Sahrens error = 0; 3349fa9e4066Sahrens goto out; 3350fa9e4066Sahrens } 3351fa9e4066Sahrens } 3352fa9e4066Sahrens 3353da6c28aaSamw vnevent_rename_src(ZTOV(szp), sdvp, snm, ct); 3354fa9e4066Sahrens if (tzp) 3355da6c28aaSamw vnevent_rename_dest(ZTOV(tzp), tdvp, tnm, ct); 3356df2381bfSpraks 3357df2381bfSpraks /* 3358df2381bfSpraks * notify the target directory if it is not the same 3359df2381bfSpraks * as source directory. 3360df2381bfSpraks */ 3361df2381bfSpraks if (tdvp != sdvp) { 3362da6c28aaSamw vnevent_rename_dest_dir(tdvp, ct); 3363df2381bfSpraks } 3364fa9e4066Sahrens 3365fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3366fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); /* nlink changes */ 3367fa9e4066Sahrens dmu_tx_hold_bonus(tx, sdzp->z_id); /* nlink changes */ 3368ea8dc4b6Seschrock dmu_tx_hold_zap(tx, sdzp->z_id, FALSE, snm); 3369ea8dc4b6Seschrock dmu_tx_hold_zap(tx, tdzp->z_id, TRUE, tnm); 3370ea8dc4b6Seschrock if (sdzp != tdzp) 3371fa9e4066Sahrens dmu_tx_hold_bonus(tx, tdzp->z_id); /* nlink changes */ 3372ea8dc4b6Seschrock if (tzp) 3373ea8dc4b6Seschrock dmu_tx_hold_bonus(tx, tzp->z_id); /* parent changes */ 3374893a6d32Sahrens dmu_tx_hold_zap(tx, zfsvfs->z_unlinkedobj, FALSE, NULL); 33751209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3376fa9e4066Sahrens if (error) { 3377fa9e4066Sahrens if (zl != NULL) 3378fa9e4066Sahrens zfs_rename_unlock(&zl); 3379fa9e4066Sahrens zfs_dirent_unlock(sdl); 3380fa9e4066Sahrens zfs_dirent_unlock(tdl); 3381afefc7e4SSanjeev Bagewadi 3382afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3383afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3384afefc7e4SSanjeev Bagewadi 3385fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3386fa9e4066Sahrens if (tzp) 3387fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 33881209a471SNeil Perrin if (error == ERESTART) { 33898a2f1b91Sahrens dmu_tx_wait(tx); 33908a2f1b91Sahrens dmu_tx_abort(tx); 3391fa9e4066Sahrens goto top; 3392fa9e4066Sahrens } 33938a2f1b91Sahrens dmu_tx_abort(tx); 3394fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3395fa9e4066Sahrens return (error); 3396fa9e4066Sahrens } 3397fa9e4066Sahrens 3398fa9e4066Sahrens if (tzp) /* Attempt to remove the existing target */ 3399da6c28aaSamw error = zfs_link_destroy(tdl, tzp, tx, zflg, NULL); 3400fa9e4066Sahrens 3401fa9e4066Sahrens if (error == 0) { 3402fa9e4066Sahrens error = zfs_link_create(tdl, szp, tx, ZRENAMING); 3403fa9e4066Sahrens if (error == 0) { 3404da6c28aaSamw szp->z_phys->zp_flags |= ZFS_AV_MODIFIED; 3405da6c28aaSamw 3406fa9e4066Sahrens error = zfs_link_destroy(sdl, szp, tx, ZRENAMING, NULL); 3407fa9e4066Sahrens ASSERT(error == 0); 3408da6c28aaSamw 3409da6c28aaSamw zfs_log_rename(zilog, tx, 3410da6c28aaSamw TX_RENAME | (flags & FIGNORECASE ? TX_CI : 0), 3411da6c28aaSamw sdzp, sdl->dl_name, tdzp, tdl->dl_name, szp); 341251ece835Seschrock 341351ece835Seschrock /* Update path information for the target vnode */ 341451ece835Seschrock vn_renamepath(tdvp, ZTOV(szp), tnm, strlen(tnm)); 3415fa9e4066Sahrens } 3416fa9e4066Sahrens } 3417fa9e4066Sahrens 3418fa9e4066Sahrens dmu_tx_commit(tx); 3419fa9e4066Sahrens out: 3420fa9e4066Sahrens if (zl != NULL) 3421fa9e4066Sahrens zfs_rename_unlock(&zl); 3422fa9e4066Sahrens 3423fa9e4066Sahrens zfs_dirent_unlock(sdl); 3424fa9e4066Sahrens zfs_dirent_unlock(tdl); 3425fa9e4066Sahrens 3426afefc7e4SSanjeev Bagewadi if (sdzp == tdzp) 3427afefc7e4SSanjeev Bagewadi rw_exit(&sdzp->z_name_lock); 3428afefc7e4SSanjeev Bagewadi 3429afefc7e4SSanjeev Bagewadi 3430fa9e4066Sahrens VN_RELE(ZTOV(szp)); 3431fa9e4066Sahrens if (tzp) 3432fa9e4066Sahrens VN_RELE(ZTOV(tzp)); 3433fa9e4066Sahrens 3434fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3435fa9e4066Sahrens return (error); 3436fa9e4066Sahrens } 3437fa9e4066Sahrens 3438fa9e4066Sahrens /* 3439fa9e4066Sahrens * Insert the indicated symbolic reference entry into the directory. 3440fa9e4066Sahrens * 3441fa9e4066Sahrens * IN: dvp - Directory to contain new symbolic link. 3442fa9e4066Sahrens * link - Name for new symlink entry. 3443fa9e4066Sahrens * vap - Attributes of new entry. 3444fa9e4066Sahrens * target - Target path of new symlink. 3445fa9e4066Sahrens * cr - credentials of caller. 3446da6c28aaSamw * ct - caller context 3447da6c28aaSamw * flags - case flags 3448fa9e4066Sahrens * 3449fa9e4066Sahrens * RETURN: 0 if success 3450fa9e4066Sahrens * error code if failure 3451fa9e4066Sahrens * 3452fa9e4066Sahrens * Timestamps: 3453fa9e4066Sahrens * dvp - ctime|mtime updated 3454fa9e4066Sahrens */ 3455da6c28aaSamw /*ARGSUSED*/ 3456fa9e4066Sahrens static int 3457da6c28aaSamw zfs_symlink(vnode_t *dvp, char *name, vattr_t *vap, char *link, cred_t *cr, 3458da6c28aaSamw caller_context_t *ct, int flags) 3459fa9e4066Sahrens { 3460fa9e4066Sahrens znode_t *zp, *dzp = VTOZ(dvp); 3461fa9e4066Sahrens zfs_dirlock_t *dl; 3462fa9e4066Sahrens dmu_tx_t *tx; 3463fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3464f18faf3fSek zilog_t *zilog; 3465fa9e4066Sahrens int len = strlen(link); 3466fa9e4066Sahrens int error; 3467da6c28aaSamw int zflg = ZNEW; 346889459e17SMark Shellenbaum zfs_acl_ids_t acl_ids; 346989459e17SMark Shellenbaum boolean_t fuid_dirtied; 3470fa9e4066Sahrens 3471fa9e4066Sahrens ASSERT(vap->va_type == VLNK); 3472fa9e4066Sahrens 34733cb34c60Sahrens ZFS_ENTER(zfsvfs); 34743cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3475f18faf3fSek zilog = zfsvfs->z_log; 3476da6c28aaSamw 3477de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, strlen(name), 3478da6c28aaSamw NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3479da6c28aaSamw ZFS_EXIT(zfsvfs); 3480da6c28aaSamw return (EILSEQ); 3481da6c28aaSamw } 3482da6c28aaSamw if (flags & FIGNORECASE) 3483da6c28aaSamw zflg |= ZCILOOK; 3484fa9e4066Sahrens top: 3485da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3486fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3487fa9e4066Sahrens return (error); 3488fa9e4066Sahrens } 3489fa9e4066Sahrens 3490fa9e4066Sahrens if (len > MAXPATHLEN) { 3491fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3492fa9e4066Sahrens return (ENAMETOOLONG); 3493fa9e4066Sahrens } 3494fa9e4066Sahrens 3495fa9e4066Sahrens /* 3496fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3497fa9e4066Sahrens */ 3498da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &zp, zflg, NULL, NULL); 3499da6c28aaSamw if (error) { 3500fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3501fa9e4066Sahrens return (error); 3502fa9e4066Sahrens } 3503fa9e4066Sahrens 350489459e17SMark Shellenbaum VERIFY(0 == zfs_acl_ids_create(dzp, 0, vap, cr, NULL, &acl_ids)); 350514843421SMatthew Ahrens if (zfs_acl_ids_overquota(zfsvfs, &acl_ids)) { 350614843421SMatthew Ahrens zfs_acl_ids_free(&acl_ids); 350714843421SMatthew Ahrens zfs_dirent_unlock(dl); 350814843421SMatthew Ahrens ZFS_EXIT(zfsvfs); 350914843421SMatthew Ahrens return (EDQUOT); 351014843421SMatthew Ahrens } 3511fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 351289459e17SMark Shellenbaum fuid_dirtied = zfsvfs->z_fuid_dirty; 3513fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, MAX(1, len)); 3514fa9e4066Sahrens dmu_tx_hold_bonus(tx, dzp->z_id); 3515ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 351689459e17SMark Shellenbaum if (acl_ids.z_aclp->z_acl_bytes > ZFS_ACE_SPACE) 3517fa9e4066Sahrens dmu_tx_hold_write(tx, DMU_NEW_OBJECT, 0, SPA_MAXBLOCKSIZE); 351814843421SMatthew Ahrens if (fuid_dirtied) 351914843421SMatthew Ahrens zfs_fuid_txhold(zfsvfs, tx); 35201209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3521fa9e4066Sahrens if (error) { 352289459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 3523fa9e4066Sahrens zfs_dirent_unlock(dl); 35241209a471SNeil Perrin if (error == ERESTART) { 35258a2f1b91Sahrens dmu_tx_wait(tx); 35268a2f1b91Sahrens dmu_tx_abort(tx); 3527fa9e4066Sahrens goto top; 3528fa9e4066Sahrens } 35298a2f1b91Sahrens dmu_tx_abort(tx); 3530fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3531fa9e4066Sahrens return (error); 3532fa9e4066Sahrens } 3533fa9e4066Sahrens 3534fa9e4066Sahrens dmu_buf_will_dirty(dzp->z_dbuf, tx); 3535fa9e4066Sahrens 3536fa9e4066Sahrens /* 3537fa9e4066Sahrens * Create a new object for the symlink. 3538fa9e4066Sahrens * Put the link content into bonus buffer if it will fit; 3539fa9e4066Sahrens * otherwise, store it just like any other file data. 3540fa9e4066Sahrens */ 3541fa9e4066Sahrens if (sizeof (znode_phys_t) + len <= dmu_bonus_max()) { 354289459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, len, &acl_ids); 3543fa9e4066Sahrens if (len != 0) 3544fa9e4066Sahrens bcopy(link, zp->z_phys + 1, len); 3545fa9e4066Sahrens } else { 3546fa9e4066Sahrens dmu_buf_t *dbp; 3547104e2ed7Sperrin 354889459e17SMark Shellenbaum zfs_mknode(dzp, vap, tx, cr, 0, &zp, 0, &acl_ids); 354989459e17SMark Shellenbaum 355089459e17SMark Shellenbaum if (fuid_dirtied) 355189459e17SMark Shellenbaum zfs_fuid_sync(zfsvfs, tx); 3552104e2ed7Sperrin /* 3553104e2ed7Sperrin * Nothing can access the znode yet so no locking needed 3554104e2ed7Sperrin * for growing the znode's blocksize. 3555104e2ed7Sperrin */ 3556104e2ed7Sperrin zfs_grow_blocksize(zp, len, tx); 3557fa9e4066Sahrens 35584ccbb6e7Sahrens VERIFY(0 == dmu_buf_hold(zfsvfs->z_os, 35594ccbb6e7Sahrens zp->z_id, 0, FTAG, &dbp)); 3560fa9e4066Sahrens dmu_buf_will_dirty(dbp, tx); 3561fa9e4066Sahrens 3562fa9e4066Sahrens ASSERT3U(len, <=, dbp->db_size); 3563fa9e4066Sahrens bcopy(link, dbp->db_data, len); 3564ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3565fa9e4066Sahrens } 3566fa9e4066Sahrens zp->z_phys->zp_size = len; 3567fa9e4066Sahrens 3568fa9e4066Sahrens /* 3569fa9e4066Sahrens * Insert the new object into the directory. 3570fa9e4066Sahrens */ 3571fa9e4066Sahrens (void) zfs_link_create(dl, zp, tx, ZNEW); 3572da6c28aaSamw if (error == 0) { 3573da6c28aaSamw uint64_t txtype = TX_SYMLINK; 3574da6c28aaSamw if (flags & FIGNORECASE) 3575da6c28aaSamw txtype |= TX_CI; 3576da6c28aaSamw zfs_log_symlink(zilog, tx, txtype, dzp, zp, name, link); 3577da6c28aaSamw } 357889459e17SMark Shellenbaum 357989459e17SMark Shellenbaum zfs_acl_ids_free(&acl_ids); 3580fa9e4066Sahrens 3581fa9e4066Sahrens dmu_tx_commit(tx); 3582fa9e4066Sahrens 3583fa9e4066Sahrens zfs_dirent_unlock(dl); 3584fa9e4066Sahrens 3585fa9e4066Sahrens VN_RELE(ZTOV(zp)); 3586fa9e4066Sahrens 3587fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3588fa9e4066Sahrens return (error); 3589fa9e4066Sahrens } 3590fa9e4066Sahrens 3591fa9e4066Sahrens /* 3592fa9e4066Sahrens * Return, in the buffer contained in the provided uio structure, 3593fa9e4066Sahrens * the symbolic path referred to by vp. 3594fa9e4066Sahrens * 3595fa9e4066Sahrens * IN: vp - vnode of symbolic link. 3596fa9e4066Sahrens * uoip - structure to contain the link path. 3597fa9e4066Sahrens * cr - credentials of caller. 3598da6c28aaSamw * ct - caller context 3599fa9e4066Sahrens * 3600fa9e4066Sahrens * OUT: uio - structure to contain the link path. 3601fa9e4066Sahrens * 3602fa9e4066Sahrens * RETURN: 0 if success 3603fa9e4066Sahrens * error code if failure 3604fa9e4066Sahrens * 3605fa9e4066Sahrens * Timestamps: 3606fa9e4066Sahrens * vp - atime updated 3607fa9e4066Sahrens */ 3608fa9e4066Sahrens /* ARGSUSED */ 3609fa9e4066Sahrens static int 3610da6c28aaSamw zfs_readlink(vnode_t *vp, uio_t *uio, cred_t *cr, caller_context_t *ct) 3611fa9e4066Sahrens { 3612fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3613fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3614fa9e4066Sahrens size_t bufsz; 3615fa9e4066Sahrens int error; 3616fa9e4066Sahrens 36173cb34c60Sahrens ZFS_ENTER(zfsvfs); 36183cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3619fa9e4066Sahrens 3620fa9e4066Sahrens bufsz = (size_t)zp->z_phys->zp_size; 3621fa9e4066Sahrens if (bufsz + sizeof (znode_phys_t) <= zp->z_dbuf->db_size) { 3622fa9e4066Sahrens error = uiomove(zp->z_phys + 1, 3623fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3624fa9e4066Sahrens } else { 3625ea8dc4b6Seschrock dmu_buf_t *dbp; 3626ea8dc4b6Seschrock error = dmu_buf_hold(zfsvfs->z_os, zp->z_id, 0, FTAG, &dbp); 3627ea8dc4b6Seschrock if (error) { 3628fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3629fa9e4066Sahrens return (error); 3630fa9e4066Sahrens } 3631fa9e4066Sahrens error = uiomove(dbp->db_data, 3632fa9e4066Sahrens MIN((size_t)bufsz, uio->uio_resid), UIO_READ, uio); 3633ea8dc4b6Seschrock dmu_buf_rele(dbp, FTAG); 3634fa9e4066Sahrens } 3635fa9e4066Sahrens 3636fa9e4066Sahrens ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 3637fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3638fa9e4066Sahrens return (error); 3639fa9e4066Sahrens } 3640fa9e4066Sahrens 3641fa9e4066Sahrens /* 3642fa9e4066Sahrens * Insert a new entry into directory tdvp referencing svp. 3643fa9e4066Sahrens * 3644fa9e4066Sahrens * IN: tdvp - Directory to contain new entry. 3645fa9e4066Sahrens * svp - vnode of new entry. 3646fa9e4066Sahrens * name - name of new entry. 3647fa9e4066Sahrens * cr - credentials of caller. 3648da6c28aaSamw * ct - caller context 3649fa9e4066Sahrens * 3650fa9e4066Sahrens * RETURN: 0 if success 3651fa9e4066Sahrens * error code if failure 3652fa9e4066Sahrens * 3653fa9e4066Sahrens * Timestamps: 3654fa9e4066Sahrens * tdvp - ctime|mtime updated 3655fa9e4066Sahrens * svp - ctime updated 3656fa9e4066Sahrens */ 3657fa9e4066Sahrens /* ARGSUSED */ 3658fa9e4066Sahrens static int 3659da6c28aaSamw zfs_link(vnode_t *tdvp, vnode_t *svp, char *name, cred_t *cr, 3660da6c28aaSamw caller_context_t *ct, int flags) 3661fa9e4066Sahrens { 3662fa9e4066Sahrens znode_t *dzp = VTOZ(tdvp); 3663fa9e4066Sahrens znode_t *tzp, *szp; 3664fa9e4066Sahrens zfsvfs_t *zfsvfs = dzp->z_zfsvfs; 3665f18faf3fSek zilog_t *zilog; 3666fa9e4066Sahrens zfs_dirlock_t *dl; 3667fa9e4066Sahrens dmu_tx_t *tx; 3668fa9e4066Sahrens vnode_t *realvp; 3669fa9e4066Sahrens int error; 3670da6c28aaSamw int zf = ZNEW; 3671da6c28aaSamw uid_t owner; 3672fa9e4066Sahrens 3673fa9e4066Sahrens ASSERT(tdvp->v_type == VDIR); 3674fa9e4066Sahrens 36753cb34c60Sahrens ZFS_ENTER(zfsvfs); 36763cb34c60Sahrens ZFS_VERIFY_ZP(dzp); 3677f18faf3fSek zilog = zfsvfs->z_log; 3678fa9e4066Sahrens 3679da6c28aaSamw if (VOP_REALVP(svp, &realvp, ct) == 0) 3680fa9e4066Sahrens svp = realvp; 3681fa9e4066Sahrens 3682fa9e4066Sahrens if (svp->v_vfsp != tdvp->v_vfsp) { 3683fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3684fa9e4066Sahrens return (EXDEV); 3685fa9e4066Sahrens } 36863cb34c60Sahrens szp = VTOZ(svp); 36873cb34c60Sahrens ZFS_VERIFY_ZP(szp); 3688fa9e4066Sahrens 3689de8267e0Stimh if (zfsvfs->z_utf8 && u8_validate(name, 3690da6c28aaSamw strlen(name), NULL, U8_VALIDATE_ENTIRE, &error) < 0) { 3691da6c28aaSamw ZFS_EXIT(zfsvfs); 3692da6c28aaSamw return (EILSEQ); 3693da6c28aaSamw } 3694da6c28aaSamw if (flags & FIGNORECASE) 3695da6c28aaSamw zf |= ZCILOOK; 3696da6c28aaSamw 3697fa9e4066Sahrens top: 3698fa9e4066Sahrens /* 3699fa9e4066Sahrens * We do not support links between attributes and non-attributes 3700fa9e4066Sahrens * because of the potential security risk of creating links 3701fa9e4066Sahrens * into "normal" file space in order to circumvent restrictions 3702fa9e4066Sahrens * imposed in attribute space. 3703fa9e4066Sahrens */ 3704fa9e4066Sahrens if ((szp->z_phys->zp_flags & ZFS_XATTR) != 3705fa9e4066Sahrens (dzp->z_phys->zp_flags & ZFS_XATTR)) { 3706fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3707fa9e4066Sahrens return (EINVAL); 3708fa9e4066Sahrens } 3709fa9e4066Sahrens 3710fa9e4066Sahrens /* 3711fa9e4066Sahrens * POSIX dictates that we return EPERM here. 3712fa9e4066Sahrens * Better choices include ENOTSUP or EISDIR. 3713fa9e4066Sahrens */ 3714fa9e4066Sahrens if (svp->v_type == VDIR) { 3715fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3716fa9e4066Sahrens return (EPERM); 3717fa9e4066Sahrens } 3718fa9e4066Sahrens 3719e0d35c44Smarks owner = zfs_fuid_map_id(zfsvfs, szp->z_phys->zp_uid, cr, ZFS_OWNER); 3720da6c28aaSamw if (owner != crgetuid(cr) && 3721fa9e4066Sahrens secpolicy_basic_link(cr) != 0) { 3722fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3723fa9e4066Sahrens return (EPERM); 3724fa9e4066Sahrens } 3725fa9e4066Sahrens 3726da6c28aaSamw if (error = zfs_zaccess(dzp, ACE_ADD_FILE, 0, B_FALSE, cr)) { 3727fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3728fa9e4066Sahrens return (error); 3729fa9e4066Sahrens } 3730fa9e4066Sahrens 3731fa9e4066Sahrens /* 3732fa9e4066Sahrens * Attempt to lock directory; fail if entry already exists. 3733fa9e4066Sahrens */ 3734da6c28aaSamw error = zfs_dirent_lock(&dl, dzp, name, &tzp, zf, NULL, NULL); 3735da6c28aaSamw if (error) { 3736fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3737fa9e4066Sahrens return (error); 3738fa9e4066Sahrens } 3739fa9e4066Sahrens 3740fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3741fa9e4066Sahrens dmu_tx_hold_bonus(tx, szp->z_id); 3742ea8dc4b6Seschrock dmu_tx_hold_zap(tx, dzp->z_id, TRUE, name); 37431209a471SNeil Perrin error = dmu_tx_assign(tx, TXG_NOWAIT); 3744fa9e4066Sahrens if (error) { 3745fa9e4066Sahrens zfs_dirent_unlock(dl); 37461209a471SNeil Perrin if (error == ERESTART) { 37478a2f1b91Sahrens dmu_tx_wait(tx); 37488a2f1b91Sahrens dmu_tx_abort(tx); 3749fa9e4066Sahrens goto top; 3750fa9e4066Sahrens } 37518a2f1b91Sahrens dmu_tx_abort(tx); 3752fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3753fa9e4066Sahrens return (error); 3754fa9e4066Sahrens } 3755fa9e4066Sahrens 3756fa9e4066Sahrens error = zfs_link_create(dl, szp, tx, 0); 3757fa9e4066Sahrens 3758da6c28aaSamw if (error == 0) { 3759da6c28aaSamw uint64_t txtype = TX_LINK; 3760da6c28aaSamw if (flags & FIGNORECASE) 3761da6c28aaSamw txtype |= TX_CI; 3762da6c28aaSamw zfs_log_link(zilog, tx, txtype, dzp, szp, name); 3763da6c28aaSamw } 3764fa9e4066Sahrens 3765fa9e4066Sahrens dmu_tx_commit(tx); 3766fa9e4066Sahrens 3767fa9e4066Sahrens zfs_dirent_unlock(dl); 3768fa9e4066Sahrens 3769df2381bfSpraks if (error == 0) { 3770da6c28aaSamw vnevent_link(svp, ct); 3771df2381bfSpraks } 3772df2381bfSpraks 3773fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3774fa9e4066Sahrens return (error); 3775fa9e4066Sahrens } 3776fa9e4066Sahrens 3777fa9e4066Sahrens /* 3778fa9e4066Sahrens * zfs_null_putapage() is used when the file system has been force 3779fa9e4066Sahrens * unmounted. It just drops the pages. 3780fa9e4066Sahrens */ 3781fa9e4066Sahrens /* ARGSUSED */ 3782fa9e4066Sahrens static int 3783fa9e4066Sahrens zfs_null_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3784fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3785fa9e4066Sahrens { 3786fa9e4066Sahrens pvn_write_done(pp, B_INVAL|B_FORCE|B_ERROR); 3787fa9e4066Sahrens return (0); 3788fa9e4066Sahrens } 3789fa9e4066Sahrens 379044eda4d7Smaybee /* 379144eda4d7Smaybee * Push a page out to disk, klustering if possible. 379244eda4d7Smaybee * 379344eda4d7Smaybee * IN: vp - file to push page to. 379444eda4d7Smaybee * pp - page to push. 379544eda4d7Smaybee * flags - additional flags. 379644eda4d7Smaybee * cr - credentials of caller. 379744eda4d7Smaybee * 379844eda4d7Smaybee * OUT: offp - start of range pushed. 379944eda4d7Smaybee * lenp - len of range pushed. 380044eda4d7Smaybee * 380144eda4d7Smaybee * RETURN: 0 if success 380244eda4d7Smaybee * error code if failure 380344eda4d7Smaybee * 380444eda4d7Smaybee * NOTE: callers must have locked the page to be pushed. On 380544eda4d7Smaybee * exit, the page (and all other pages in the kluster) must be 380644eda4d7Smaybee * unlocked. 380744eda4d7Smaybee */ 3808fa9e4066Sahrens /* ARGSUSED */ 3809fa9e4066Sahrens static int 3810fa9e4066Sahrens zfs_putapage(vnode_t *vp, page_t *pp, u_offset_t *offp, 3811fa9e4066Sahrens size_t *lenp, int flags, cred_t *cr) 3812fa9e4066Sahrens { 3813fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3814fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3815fa9e4066Sahrens dmu_tx_t *tx; 381644eda4d7Smaybee u_offset_t off, koff; 381744eda4d7Smaybee size_t len, klen; 3818f4d2e9e6Smaybee uint64_t filesz; 3819fa9e4066Sahrens int err; 3820fa9e4066Sahrens 3821f4d2e9e6Smaybee filesz = zp->z_phys->zp_size; 3822fa9e4066Sahrens off = pp->p_offset; 382344eda4d7Smaybee len = PAGESIZE; 382444eda4d7Smaybee /* 382544eda4d7Smaybee * If our blocksize is bigger than the page size, try to kluster 38261209a471SNeil Perrin * multiple pages so that we write a full block (thus avoiding 382744eda4d7Smaybee * a read-modify-write). 382844eda4d7Smaybee */ 3829f4d2e9e6Smaybee if (off < filesz && zp->z_blksz > PAGESIZE) { 3830ac05c741SMark Maybee klen = P2ROUNDUP((ulong_t)zp->z_blksz, PAGESIZE); 3831ac05c741SMark Maybee koff = ISP2(klen) ? P2ALIGN(off, (u_offset_t)klen) : 0; 383244eda4d7Smaybee ASSERT(koff <= filesz); 383344eda4d7Smaybee if (koff + klen > filesz) 383444eda4d7Smaybee klen = P2ROUNDUP(filesz - koff, (uint64_t)PAGESIZE); 383544eda4d7Smaybee pp = pvn_write_kluster(vp, pp, &off, &len, koff, klen, flags); 383644eda4d7Smaybee } 383744eda4d7Smaybee ASSERT3U(btop(len), ==, btopr(len)); 3838ac05c741SMark Maybee 3839dd6ef538Smaybee /* 3840dd6ef538Smaybee * Can't push pages past end-of-file. 3841dd6ef538Smaybee */ 3842f4d2e9e6Smaybee if (off >= filesz) { 3843f4d2e9e6Smaybee /* ignore all pages */ 384444eda4d7Smaybee err = 0; 384544eda4d7Smaybee goto out; 3846f4d2e9e6Smaybee } else if (off + len > filesz) { 3847f4d2e9e6Smaybee int npages = btopr(filesz - off); 384844eda4d7Smaybee page_t *trunc; 384944eda4d7Smaybee 385044eda4d7Smaybee page_list_break(&pp, &trunc, npages); 3851f4d2e9e6Smaybee /* ignore pages past end of file */ 385244eda4d7Smaybee if (trunc) 3853f4d2e9e6Smaybee pvn_write_done(trunc, flags); 3854f4d2e9e6Smaybee len = filesz - off; 3855dd6ef538Smaybee } 385614843421SMatthew Ahrens 385714843421SMatthew Ahrens if (zfs_usergroup_overquota(zfsvfs, B_FALSE, zp->z_phys->zp_uid) || 385814843421SMatthew Ahrens zfs_usergroup_overquota(zfsvfs, B_TRUE, zp->z_phys->zp_gid)) { 385914843421SMatthew Ahrens err = EDQUOT; 386014843421SMatthew Ahrens goto out; 386114843421SMatthew Ahrens } 3862ac05c741SMark Maybee top: 3863fa9e4066Sahrens tx = dmu_tx_create(zfsvfs->z_os); 3864fa9e4066Sahrens dmu_tx_hold_write(tx, zp->z_id, off, len); 3865fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 38661209a471SNeil Perrin err = dmu_tx_assign(tx, TXG_NOWAIT); 3867fa9e4066Sahrens if (err != 0) { 38681209a471SNeil Perrin if (err == ERESTART) { 38698a2f1b91Sahrens dmu_tx_wait(tx); 38708a2f1b91Sahrens dmu_tx_abort(tx); 3871fa9e4066Sahrens goto top; 3872fa9e4066Sahrens } 38738a2f1b91Sahrens dmu_tx_abort(tx); 3874fa9e4066Sahrens goto out; 3875fa9e4066Sahrens } 3876fa9e4066Sahrens 387744eda4d7Smaybee if (zp->z_blksz <= PAGESIZE) { 38780fab61baSJonathan W Adams caddr_t va = zfs_map_page(pp, S_READ); 387944eda4d7Smaybee ASSERT3U(len, <=, PAGESIZE); 388044eda4d7Smaybee dmu_write(zfsvfs->z_os, zp->z_id, off, len, va, tx); 38810fab61baSJonathan W Adams zfs_unmap_page(pp, va); 388244eda4d7Smaybee } else { 388344eda4d7Smaybee err = dmu_write_pages(zfsvfs->z_os, zp->z_id, off, len, pp, tx); 388444eda4d7Smaybee } 3885fa9e4066Sahrens 388644eda4d7Smaybee if (err == 0) { 388744eda4d7Smaybee zfs_time_stamper(zp, CONTENT_MODIFIED, tx); 3888ac05c741SMark Maybee zfs_log_write(zfsvfs->z_log, tx, TX_WRITE, zp, off, len, 0); 388944eda4d7Smaybee } 389068857716SLin Ling dmu_tx_commit(tx); 3891fa9e4066Sahrens 389244eda4d7Smaybee out: 3893f4d2e9e6Smaybee pvn_write_done(pp, (err ? B_ERROR : 0) | flags); 3894fa9e4066Sahrens if (offp) 3895fa9e4066Sahrens *offp = off; 3896fa9e4066Sahrens if (lenp) 3897fa9e4066Sahrens *lenp = len; 3898fa9e4066Sahrens 3899fa9e4066Sahrens return (err); 3900fa9e4066Sahrens } 3901fa9e4066Sahrens 3902fa9e4066Sahrens /* 3903fa9e4066Sahrens * Copy the portion of the file indicated from pages into the file. 3904fa9e4066Sahrens * The pages are stored in a page list attached to the files vnode. 3905fa9e4066Sahrens * 3906fa9e4066Sahrens * IN: vp - vnode of file to push page data to. 3907fa9e4066Sahrens * off - position in file to put data. 3908fa9e4066Sahrens * len - amount of data to write. 3909fa9e4066Sahrens * flags - flags to control the operation. 3910fa9e4066Sahrens * cr - credentials of caller. 3911da6c28aaSamw * ct - caller context. 3912fa9e4066Sahrens * 3913fa9e4066Sahrens * RETURN: 0 if success 3914fa9e4066Sahrens * error code if failure 3915fa9e4066Sahrens * 3916fa9e4066Sahrens * Timestamps: 3917fa9e4066Sahrens * vp - ctime|mtime updated 3918fa9e4066Sahrens */ 3919da6c28aaSamw /*ARGSUSED*/ 3920fa9e4066Sahrens static int 3921da6c28aaSamw zfs_putpage(vnode_t *vp, offset_t off, size_t len, int flags, cred_t *cr, 3922da6c28aaSamw caller_context_t *ct) 3923fa9e4066Sahrens { 3924fa9e4066Sahrens znode_t *zp = VTOZ(vp); 3925fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 3926fa9e4066Sahrens page_t *pp; 3927fa9e4066Sahrens size_t io_len; 3928fa9e4066Sahrens u_offset_t io_off; 3929ac05c741SMark Maybee uint_t blksz; 3930ac05c741SMark Maybee rl_t *rl; 3931fa9e4066Sahrens int error = 0; 3932fa9e4066Sahrens 39333cb34c60Sahrens ZFS_ENTER(zfsvfs); 39343cb34c60Sahrens ZFS_VERIFY_ZP(zp); 3935fa9e4066Sahrens 3936ac05c741SMark Maybee /* 3937ac05c741SMark Maybee * Align this request to the file block size in case we kluster. 3938ac05c741SMark Maybee * XXX - this can result in pretty aggresive locking, which can 3939ac05c741SMark Maybee * impact simultanious read/write access. One option might be 3940ac05c741SMark Maybee * to break up long requests (len == 0) into block-by-block 3941ac05c741SMark Maybee * operations to get narrower locking. 3942ac05c741SMark Maybee */ 3943ac05c741SMark Maybee blksz = zp->z_blksz; 3944ac05c741SMark Maybee if (ISP2(blksz)) 3945ac05c741SMark Maybee io_off = P2ALIGN_TYPED(off, blksz, u_offset_t); 3946ac05c741SMark Maybee else 3947ac05c741SMark Maybee io_off = 0; 3948ac05c741SMark Maybee if (len > 0 && ISP2(blksz)) 39495a6f5619SMark Maybee io_len = P2ROUNDUP_TYPED(len + (off - io_off), blksz, size_t); 3950ac05c741SMark Maybee else 3951ac05c741SMark Maybee io_len = 0; 3952ac05c741SMark Maybee 3953ac05c741SMark Maybee if (io_len == 0) { 3954fa9e4066Sahrens /* 3955ac05c741SMark Maybee * Search the entire vp list for pages >= io_off. 3956fa9e4066Sahrens */ 3957ac05c741SMark Maybee rl = zfs_range_lock(zp, io_off, UINT64_MAX, RL_WRITER); 3958ac05c741SMark Maybee error = pvn_vplist_dirty(vp, io_off, zfs_putapage, flags, cr); 3959fe9cf88cSperrin goto out; 3960fa9e4066Sahrens } 3961ac05c741SMark Maybee rl = zfs_range_lock(zp, io_off, io_len, RL_WRITER); 3962fa9e4066Sahrens 3963ac05c741SMark Maybee if (off > zp->z_phys->zp_size) { 3964fa9e4066Sahrens /* past end of file */ 3965ac05c741SMark Maybee zfs_range_unlock(rl); 3966fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3967fa9e4066Sahrens return (0); 3968fa9e4066Sahrens } 3969fa9e4066Sahrens 3970ac05c741SMark Maybee len = MIN(io_len, P2ROUNDUP(zp->z_phys->zp_size, PAGESIZE) - io_off); 3971fa9e4066Sahrens 3972ac05c741SMark Maybee for (off = io_off; io_off < off + len; io_off += io_len) { 3973fa9e4066Sahrens if ((flags & B_INVAL) || ((flags & B_ASYNC) == 0)) { 3974104e2ed7Sperrin pp = page_lookup(vp, io_off, 3975ecb72030Sperrin (flags & (B_INVAL | B_FREE)) ? SE_EXCL : SE_SHARED); 3976fa9e4066Sahrens } else { 3977fa9e4066Sahrens pp = page_lookup_nowait(vp, io_off, 3978ecb72030Sperrin (flags & B_FREE) ? SE_EXCL : SE_SHARED); 3979fa9e4066Sahrens } 3980fa9e4066Sahrens 3981fa9e4066Sahrens if (pp != NULL && pvn_getdirty(pp, flags)) { 3982fa9e4066Sahrens int err; 3983fa9e4066Sahrens 3984fa9e4066Sahrens /* 3985fa9e4066Sahrens * Found a dirty page to push 3986fa9e4066Sahrens */ 3987104e2ed7Sperrin err = zfs_putapage(vp, pp, &io_off, &io_len, flags, cr); 3988104e2ed7Sperrin if (err) 3989fa9e4066Sahrens error = err; 3990fa9e4066Sahrens } else { 3991fa9e4066Sahrens io_len = PAGESIZE; 3992fa9e4066Sahrens } 3993fa9e4066Sahrens } 3994fe9cf88cSperrin out: 3995ac05c741SMark Maybee zfs_range_unlock(rl); 3996b19a79ecSperrin if ((flags & B_ASYNC) == 0) 3997b19a79ecSperrin zil_commit(zfsvfs->z_log, UINT64_MAX, zp->z_id); 3998fa9e4066Sahrens ZFS_EXIT(zfsvfs); 3999fa9e4066Sahrens return (error); 4000fa9e4066Sahrens } 4001fa9e4066Sahrens 4002da6c28aaSamw /*ARGSUSED*/ 4003fa9e4066Sahrens void 4004da6c28aaSamw zfs_inactive(vnode_t *vp, cred_t *cr, caller_context_t *ct) 4005fa9e4066Sahrens { 4006fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4007fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4008fa9e4066Sahrens int error; 4009fa9e4066Sahrens 4010f18faf3fSek rw_enter(&zfsvfs->z_teardown_inactive_lock, RW_READER); 40114ccbb6e7Sahrens if (zp->z_dbuf == NULL) { 40124ccbb6e7Sahrens /* 4013874395d5Smaybee * The fs has been unmounted, or we did a 4014874395d5Smaybee * suspend/resume and this file no longer exists. 40154ccbb6e7Sahrens */ 4016fa9e4066Sahrens if (vn_has_cached_data(vp)) { 4017fa9e4066Sahrens (void) pvn_vplist_dirty(vp, 0, zfs_null_putapage, 4018fa9e4066Sahrens B_INVAL, cr); 4019fa9e4066Sahrens } 4020fa9e4066Sahrens 4021ea8dc4b6Seschrock mutex_enter(&zp->z_lock); 4022cd2adeceSChris Kirby mutex_enter(&vp->v_lock); 4023cd2adeceSChris Kirby ASSERT(vp->v_count == 1); 4024cd2adeceSChris Kirby vp->v_count = 0; 4025cd2adeceSChris Kirby mutex_exit(&vp->v_lock); 40264ccbb6e7Sahrens mutex_exit(&zp->z_lock); 4027f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 4028874395d5Smaybee zfs_znode_free(zp); 4029fa9e4066Sahrens return; 4030fa9e4066Sahrens } 4031fa9e4066Sahrens 4032fa9e4066Sahrens /* 4033fa9e4066Sahrens * Attempt to push any data in the page cache. If this fails 4034fa9e4066Sahrens * we will get kicked out later in zfs_zinactive(). 4035fa9e4066Sahrens */ 40368afd4dd6Sperrin if (vn_has_cached_data(vp)) { 40378afd4dd6Sperrin (void) pvn_vplist_dirty(vp, 0, zfs_putapage, B_INVAL|B_ASYNC, 40388afd4dd6Sperrin cr); 40398afd4dd6Sperrin } 4040fa9e4066Sahrens 4041893a6d32Sahrens if (zp->z_atime_dirty && zp->z_unlinked == 0) { 4042fa9e4066Sahrens dmu_tx_t *tx = dmu_tx_create(zfsvfs->z_os); 4043fa9e4066Sahrens 4044fa9e4066Sahrens dmu_tx_hold_bonus(tx, zp->z_id); 4045fa9e4066Sahrens error = dmu_tx_assign(tx, TXG_WAIT); 4046fa9e4066Sahrens if (error) { 4047fa9e4066Sahrens dmu_tx_abort(tx); 4048fa9e4066Sahrens } else { 4049fa9e4066Sahrens dmu_buf_will_dirty(zp->z_dbuf, tx); 4050fa9e4066Sahrens mutex_enter(&zp->z_lock); 4051fa9e4066Sahrens zp->z_atime_dirty = 0; 4052fa9e4066Sahrens mutex_exit(&zp->z_lock); 4053fa9e4066Sahrens dmu_tx_commit(tx); 4054fa9e4066Sahrens } 4055fa9e4066Sahrens } 4056fa9e4066Sahrens 4057fa9e4066Sahrens zfs_zinactive(zp); 4058f18faf3fSek rw_exit(&zfsvfs->z_teardown_inactive_lock); 4059fa9e4066Sahrens } 4060fa9e4066Sahrens 4061fa9e4066Sahrens /* 4062fa9e4066Sahrens * Bounds-check the seek operation. 4063fa9e4066Sahrens * 4064fa9e4066Sahrens * IN: vp - vnode seeking within 4065fa9e4066Sahrens * ooff - old file offset 4066fa9e4066Sahrens * noffp - pointer to new file offset 4067da6c28aaSamw * ct - caller context 4068fa9e4066Sahrens * 4069fa9e4066Sahrens * RETURN: 0 if success 4070fa9e4066Sahrens * EINVAL if new offset invalid 4071fa9e4066Sahrens */ 4072fa9e4066Sahrens /* ARGSUSED */ 4073fa9e4066Sahrens static int 4074da6c28aaSamw zfs_seek(vnode_t *vp, offset_t ooff, offset_t *noffp, 4075da6c28aaSamw caller_context_t *ct) 4076fa9e4066Sahrens { 4077fa9e4066Sahrens if (vp->v_type == VDIR) 4078fa9e4066Sahrens return (0); 4079fa9e4066Sahrens return ((*noffp < 0 || *noffp > MAXOFFSET_T) ? EINVAL : 0); 4080fa9e4066Sahrens } 4081fa9e4066Sahrens 4082fa9e4066Sahrens /* 4083fa9e4066Sahrens * Pre-filter the generic locking function to trap attempts to place 4084fa9e4066Sahrens * a mandatory lock on a memory mapped file. 4085fa9e4066Sahrens */ 4086fa9e4066Sahrens static int 4087fa9e4066Sahrens zfs_frlock(vnode_t *vp, int cmd, flock64_t *bfp, int flag, offset_t offset, 4088da6c28aaSamw flk_callback_t *flk_cbp, cred_t *cr, caller_context_t *ct) 4089fa9e4066Sahrens { 4090fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4091fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4092fa9e4066Sahrens 40933cb34c60Sahrens ZFS_ENTER(zfsvfs); 40943cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4095fa9e4066Sahrens 4096fa9e4066Sahrens /* 4097ea8dc4b6Seschrock * We are following the UFS semantics with respect to mapcnt 4098ea8dc4b6Seschrock * here: If we see that the file is mapped already, then we will 4099ea8dc4b6Seschrock * return an error, but we don't worry about races between this 4100ea8dc4b6Seschrock * function and zfs_map(). 4101fa9e4066Sahrens */ 4102ea8dc4b6Seschrock if (zp->z_mapcnt > 0 && MANDMODE((mode_t)zp->z_phys->zp_mode)) { 4103fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4104fa9e4066Sahrens return (EAGAIN); 4105fa9e4066Sahrens } 4106fa9e4066Sahrens ZFS_EXIT(zfsvfs); 410704ce3d0bSMark Shellenbaum return (fs_frlock(vp, cmd, bfp, flag, offset, flk_cbp, cr, ct)); 4108fa9e4066Sahrens } 4109fa9e4066Sahrens 4110fa9e4066Sahrens /* 4111fa9e4066Sahrens * If we can't find a page in the cache, we will create a new page 4112fa9e4066Sahrens * and fill it with file data. For efficiency, we may try to fill 4113ac05c741SMark Maybee * multiple pages at once (klustering) to fill up the supplied page 4114ed886187SMark Maybee * list. Note that the pages to be filled are held with an exclusive 4115ed886187SMark Maybee * lock to prevent access by other threads while they are being filled. 4116fa9e4066Sahrens */ 4117fa9e4066Sahrens static int 4118fa9e4066Sahrens zfs_fillpage(vnode_t *vp, u_offset_t off, struct seg *seg, 4119fa9e4066Sahrens caddr_t addr, page_t *pl[], size_t plsz, enum seg_rw rw) 4120fa9e4066Sahrens { 4121fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4122fa9e4066Sahrens page_t *pp, *cur_pp; 4123fa9e4066Sahrens objset_t *os = zp->z_zfsvfs->z_os; 4124fa9e4066Sahrens u_offset_t io_off, total; 4125fa9e4066Sahrens size_t io_len; 4126fa9e4066Sahrens int err; 4127fa9e4066Sahrens 412844eda4d7Smaybee if (plsz == PAGESIZE || zp->z_blksz <= PAGESIZE) { 4129ac05c741SMark Maybee /* 4130ac05c741SMark Maybee * We only have a single page, don't bother klustering 4131ac05c741SMark Maybee */ 4132fa9e4066Sahrens io_off = off; 4133fa9e4066Sahrens io_len = PAGESIZE; 4134ed886187SMark Maybee pp = page_create_va(vp, io_off, io_len, 4135ed886187SMark Maybee PG_EXCL | PG_WAIT, seg, addr); 4136fa9e4066Sahrens } else { 4137fa9e4066Sahrens /* 4138ac05c741SMark Maybee * Try to find enough pages to fill the page list 4139fa9e4066Sahrens */ 4140fa9e4066Sahrens pp = pvn_read_kluster(vp, off, seg, addr, &io_off, 4141ac05c741SMark Maybee &io_len, off, plsz, 0); 4142fa9e4066Sahrens } 4143fa9e4066Sahrens if (pp == NULL) { 4144fa9e4066Sahrens /* 4145ac05c741SMark Maybee * The page already exists, nothing to do here. 4146fa9e4066Sahrens */ 4147fa9e4066Sahrens *pl = NULL; 4148fa9e4066Sahrens return (0); 4149fa9e4066Sahrens } 4150fa9e4066Sahrens 4151fa9e4066Sahrens /* 4152fa9e4066Sahrens * Fill the pages in the kluster. 4153fa9e4066Sahrens */ 4154fa9e4066Sahrens cur_pp = pp; 4155fa9e4066Sahrens for (total = io_off + io_len; io_off < total; io_off += PAGESIZE) { 4156ac05c741SMark Maybee caddr_t va; 4157ac05c741SMark Maybee 415844eda4d7Smaybee ASSERT3U(io_off, ==, cur_pp->p_offset); 41590fab61baSJonathan W Adams va = zfs_map_page(cur_pp, S_WRITE); 41607bfdf011SNeil Perrin err = dmu_read(os, zp->z_id, io_off, PAGESIZE, va, 41617bfdf011SNeil Perrin DMU_READ_PREFETCH); 41620fab61baSJonathan W Adams zfs_unmap_page(cur_pp, va); 4163fa9e4066Sahrens if (err) { 4164fa9e4066Sahrens /* On error, toss the entire kluster */ 4165fa9e4066Sahrens pvn_read_done(pp, B_ERROR); 4166b87f3af3Sperrin /* convert checksum errors into IO errors */ 4167b87f3af3Sperrin if (err == ECKSUM) 4168b87f3af3Sperrin err = EIO; 4169fa9e4066Sahrens return (err); 4170fa9e4066Sahrens } 4171fa9e4066Sahrens cur_pp = cur_pp->p_next; 4172fa9e4066Sahrens } 4173ac05c741SMark Maybee 4174fa9e4066Sahrens /* 4175ac05c741SMark Maybee * Fill in the page list array from the kluster starting 4176ac05c741SMark Maybee * from the desired offset `off'. 4177fa9e4066Sahrens * NOTE: the page list will always be null terminated. 4178fa9e4066Sahrens */ 4179fa9e4066Sahrens pvn_plist_init(pp, pl, plsz, off, io_len, rw); 4180ac05c741SMark Maybee ASSERT(pl == NULL || (*pl)->p_offset == off); 4181fa9e4066Sahrens 4182fa9e4066Sahrens return (0); 4183fa9e4066Sahrens } 4184fa9e4066Sahrens 4185fa9e4066Sahrens /* 4186fa9e4066Sahrens * Return pointers to the pages for the file region [off, off + len] 4187fa9e4066Sahrens * in the pl array. If plsz is greater than len, this function may 4188ac05c741SMark Maybee * also return page pointers from after the specified region 4189ac05c741SMark Maybee * (i.e. the region [off, off + plsz]). These additional pages are 4190ac05c741SMark Maybee * only returned if they are already in the cache, or were created as 4191ac05c741SMark Maybee * part of a klustered read. 4192fa9e4066Sahrens * 4193fa9e4066Sahrens * IN: vp - vnode of file to get data from. 4194fa9e4066Sahrens * off - position in file to get data from. 4195fa9e4066Sahrens * len - amount of data to retrieve. 4196fa9e4066Sahrens * plsz - length of provided page list. 4197fa9e4066Sahrens * seg - segment to obtain pages for. 4198fa9e4066Sahrens * addr - virtual address of fault. 4199fa9e4066Sahrens * rw - mode of created pages. 4200fa9e4066Sahrens * cr - credentials of caller. 4201da6c28aaSamw * ct - caller context. 4202fa9e4066Sahrens * 4203fa9e4066Sahrens * OUT: protp - protection mode of created pages. 4204fa9e4066Sahrens * pl - list of pages created. 4205fa9e4066Sahrens * 4206fa9e4066Sahrens * RETURN: 0 if success 4207fa9e4066Sahrens * error code if failure 4208fa9e4066Sahrens * 4209fa9e4066Sahrens * Timestamps: 4210fa9e4066Sahrens * vp - atime updated 4211fa9e4066Sahrens */ 4212fa9e4066Sahrens /* ARGSUSED */ 4213fa9e4066Sahrens static int 4214fa9e4066Sahrens zfs_getpage(vnode_t *vp, offset_t off, size_t len, uint_t *protp, 4215fa9e4066Sahrens page_t *pl[], size_t plsz, struct seg *seg, caddr_t addr, 4216da6c28aaSamw enum seg_rw rw, cred_t *cr, caller_context_t *ct) 4217fa9e4066Sahrens { 4218fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4219fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4220ac05c741SMark Maybee page_t **pl0 = pl; 4221ac05c741SMark Maybee int err = 0; 4222ac05c741SMark Maybee 4223ac05c741SMark Maybee /* we do our own caching, faultahead is unnecessary */ 4224ac05c741SMark Maybee if (pl == NULL) 4225ac05c741SMark Maybee return (0); 4226ac05c741SMark Maybee else if (len > plsz) 4227ac05c741SMark Maybee len = plsz; 422827bd165aSMark Maybee else 422927bd165aSMark Maybee len = P2ROUNDUP(len, PAGESIZE); 4230ac05c741SMark Maybee ASSERT(plsz >= len); 4231fa9e4066Sahrens 42323cb34c60Sahrens ZFS_ENTER(zfsvfs); 42333cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4234fa9e4066Sahrens 4235fa9e4066Sahrens if (protp) 4236fa9e4066Sahrens *protp = PROT_ALL; 4237fa9e4066Sahrens 4238fa9e4066Sahrens /* 4239ed886187SMark Maybee * Loop through the requested range [off, off + len) looking 4240fa9e4066Sahrens * for pages. If we don't find a page, we will need to create 4241fa9e4066Sahrens * a new page and fill it with data from the file. 4242fa9e4066Sahrens */ 4243fa9e4066Sahrens while (len > 0) { 4244ac05c741SMark Maybee if (*pl = page_lookup(vp, off, SE_SHARED)) 4245ac05c741SMark Maybee *(pl+1) = NULL; 4246ac05c741SMark Maybee else if (err = zfs_fillpage(vp, off, seg, addr, pl, plsz, rw)) 4247ac05c741SMark Maybee goto out; 4248ac05c741SMark Maybee while (*pl) { 4249ac05c741SMark Maybee ASSERT3U((*pl)->p_offset, ==, off); 4250fa9e4066Sahrens off += PAGESIZE; 4251fa9e4066Sahrens addr += PAGESIZE; 425227bd165aSMark Maybee if (len > 0) { 425327bd165aSMark Maybee ASSERT3U(len, >=, PAGESIZE); 4254ac05c741SMark Maybee len -= PAGESIZE; 425527bd165aSMark Maybee } 4256ac05c741SMark Maybee ASSERT3U(plsz, >=, PAGESIZE); 4257fa9e4066Sahrens plsz -= PAGESIZE; 4258ac05c741SMark Maybee pl++; 4259fa9e4066Sahrens } 4260fa9e4066Sahrens } 4261fa9e4066Sahrens 4262fa9e4066Sahrens /* 4263fa9e4066Sahrens * Fill out the page array with any pages already in the cache. 4264fa9e4066Sahrens */ 4265ac05c741SMark Maybee while (plsz > 0 && 4266ac05c741SMark Maybee (*pl++ = page_lookup_nowait(vp, off, SE_SHARED))) { 4267ac05c741SMark Maybee off += PAGESIZE; 4268ac05c741SMark Maybee plsz -= PAGESIZE; 4269fa9e4066Sahrens } 4270fa9e4066Sahrens out: 4271fe2f476aSperrin if (err) { 4272fe2f476aSperrin /* 4273fe2f476aSperrin * Release any pages we have previously locked. 4274fe2f476aSperrin */ 4275fe2f476aSperrin while (pl > pl0) 4276fe2f476aSperrin page_unlock(*--pl); 4277ac05c741SMark Maybee } else { 4278ac05c741SMark Maybee ZFS_ACCESSTIME_STAMP(zfsvfs, zp); 4279fe2f476aSperrin } 4280fe2f476aSperrin 4281fa9e4066Sahrens *pl = NULL; 4282fa9e4066Sahrens 4283fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4284fa9e4066Sahrens return (err); 4285fa9e4066Sahrens } 4286fa9e4066Sahrens 4287ea8dc4b6Seschrock /* 4288ea8dc4b6Seschrock * Request a memory map for a section of a file. This code interacts 4289ea8dc4b6Seschrock * with common code and the VM system as follows: 4290ea8dc4b6Seschrock * 4291ea8dc4b6Seschrock * common code calls mmap(), which ends up in smmap_common() 4292ea8dc4b6Seschrock * 4293ea8dc4b6Seschrock * this calls VOP_MAP(), which takes you into (say) zfs 4294ea8dc4b6Seschrock * 4295ea8dc4b6Seschrock * zfs_map() calls as_map(), passing segvn_create() as the callback 4296ea8dc4b6Seschrock * 4297ea8dc4b6Seschrock * segvn_create() creates the new segment and calls VOP_ADDMAP() 4298ea8dc4b6Seschrock * 4299ea8dc4b6Seschrock * zfs_addmap() updates z_mapcnt 4300ea8dc4b6Seschrock */ 4301da6c28aaSamw /*ARGSUSED*/ 4302fa9e4066Sahrens static int 4303fa9e4066Sahrens zfs_map(vnode_t *vp, offset_t off, struct as *as, caddr_t *addrp, 4304da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4305da6c28aaSamw caller_context_t *ct) 4306fa9e4066Sahrens { 4307fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4308fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4309fa9e4066Sahrens segvn_crargs_t vn_a; 4310fa9e4066Sahrens int error; 4311fa9e4066Sahrens 43120616c50eSmarks ZFS_ENTER(zfsvfs); 43130616c50eSmarks ZFS_VERIFY_ZP(zp); 43140616c50eSmarks 4315da6c28aaSamw if ((prot & PROT_WRITE) && 4316da6c28aaSamw (zp->z_phys->zp_flags & (ZFS_IMMUTABLE | ZFS_READONLY | 43170616c50eSmarks ZFS_APPENDONLY))) { 43180616c50eSmarks ZFS_EXIT(zfsvfs); 4319da6c28aaSamw return (EPERM); 43200616c50eSmarks } 4321da6c28aaSamw 43220616c50eSmarks if ((prot & (PROT_READ | PROT_EXEC)) && 43230616c50eSmarks (zp->z_phys->zp_flags & ZFS_AV_QUARANTINED)) { 43240616c50eSmarks ZFS_EXIT(zfsvfs); 43250616c50eSmarks return (EACCES); 43260616c50eSmarks } 4327fa9e4066Sahrens 4328fa9e4066Sahrens if (vp->v_flag & VNOMAP) { 4329fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4330fa9e4066Sahrens return (ENOSYS); 4331fa9e4066Sahrens } 4332fa9e4066Sahrens 4333fa9e4066Sahrens if (off < 0 || len > MAXOFFSET_T - off) { 4334fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4335fa9e4066Sahrens return (ENXIO); 4336fa9e4066Sahrens } 4337fa9e4066Sahrens 4338fa9e4066Sahrens if (vp->v_type != VREG) { 4339fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4340fa9e4066Sahrens return (ENODEV); 4341fa9e4066Sahrens } 4342fa9e4066Sahrens 4343fa9e4066Sahrens /* 4344fa9e4066Sahrens * If file is locked, disallow mapping. 4345fa9e4066Sahrens */ 4346ea8dc4b6Seschrock if (MANDMODE((mode_t)zp->z_phys->zp_mode) && vn_has_flocks(vp)) { 4347ea8dc4b6Seschrock ZFS_EXIT(zfsvfs); 4348ea8dc4b6Seschrock return (EAGAIN); 4349fa9e4066Sahrens } 4350fa9e4066Sahrens 4351fa9e4066Sahrens as_rangelock(as); 435260946fe0Smec error = choose_addr(as, addrp, len, off, ADDR_VACALIGN, flags); 435360946fe0Smec if (error != 0) { 435460946fe0Smec as_rangeunlock(as); 435560946fe0Smec ZFS_EXIT(zfsvfs); 435660946fe0Smec return (error); 4357fa9e4066Sahrens } 4358fa9e4066Sahrens 4359fa9e4066Sahrens vn_a.vp = vp; 4360fa9e4066Sahrens vn_a.offset = (u_offset_t)off; 4361fa9e4066Sahrens vn_a.type = flags & MAP_TYPE; 4362fa9e4066Sahrens vn_a.prot = prot; 4363fa9e4066Sahrens vn_a.maxprot = maxprot; 4364fa9e4066Sahrens vn_a.cred = cr; 4365fa9e4066Sahrens vn_a.amp = NULL; 4366fa9e4066Sahrens vn_a.flags = flags & ~MAP_TYPE; 43674944b02eSkchow vn_a.szc = 0; 43684944b02eSkchow vn_a.lgrp_mem_policy_flags = 0; 4369fa9e4066Sahrens 4370fa9e4066Sahrens error = as_map(as, *addrp, len, segvn_create, &vn_a); 4371fa9e4066Sahrens 4372fa9e4066Sahrens as_rangeunlock(as); 4373fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4374fa9e4066Sahrens return (error); 4375fa9e4066Sahrens } 4376fa9e4066Sahrens 4377fa9e4066Sahrens /* ARGSUSED */ 4378fa9e4066Sahrens static int 4379fa9e4066Sahrens zfs_addmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4380da6c28aaSamw size_t len, uchar_t prot, uchar_t maxprot, uint_t flags, cred_t *cr, 4381da6c28aaSamw caller_context_t *ct) 4382fa9e4066Sahrens { 4383ea8dc4b6Seschrock uint64_t pages = btopr(len); 4384ea8dc4b6Seschrock 4385ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, pages); 4386fa9e4066Sahrens return (0); 4387fa9e4066Sahrens } 4388fa9e4066Sahrens 4389b468a217Seschrock /* 4390b468a217Seschrock * The reason we push dirty pages as part of zfs_delmap() is so that we get a 4391b468a217Seschrock * more accurate mtime for the associated file. Since we don't have a way of 4392b468a217Seschrock * detecting when the data was actually modified, we have to resort to 4393b468a217Seschrock * heuristics. If an explicit msync() is done, then we mark the mtime when the 4394b468a217Seschrock * last page is pushed. The problem occurs when the msync() call is omitted, 4395b468a217Seschrock * which by far the most common case: 4396b468a217Seschrock * 4397b468a217Seschrock * open() 4398b468a217Seschrock * mmap() 4399b468a217Seschrock * <modify memory> 4400b468a217Seschrock * munmap() 4401b468a217Seschrock * close() 4402b468a217Seschrock * <time lapse> 4403b468a217Seschrock * putpage() via fsflush 4404b468a217Seschrock * 4405b468a217Seschrock * If we wait until fsflush to come along, we can have a modification time that 4406b468a217Seschrock * is some arbitrary point in the future. In order to prevent this in the 4407b468a217Seschrock * common case, we flush pages whenever a (MAP_SHARED, PROT_WRITE) mapping is 4408b468a217Seschrock * torn down. 4409b468a217Seschrock */ 4410fa9e4066Sahrens /* ARGSUSED */ 4411fa9e4066Sahrens static int 4412fa9e4066Sahrens zfs_delmap(vnode_t *vp, offset_t off, struct as *as, caddr_t addr, 4413da6c28aaSamw size_t len, uint_t prot, uint_t maxprot, uint_t flags, cred_t *cr, 4414da6c28aaSamw caller_context_t *ct) 4415fa9e4066Sahrens { 4416ea8dc4b6Seschrock uint64_t pages = btopr(len); 4417ea8dc4b6Seschrock 4418ea8dc4b6Seschrock ASSERT3U(VTOZ(vp)->z_mapcnt, >=, pages); 4419ea8dc4b6Seschrock atomic_add_64(&VTOZ(vp)->z_mapcnt, -pages); 4420b468a217Seschrock 4421b468a217Seschrock if ((flags & MAP_SHARED) && (prot & PROT_WRITE) && 4422b468a217Seschrock vn_has_cached_data(vp)) 4423da6c28aaSamw (void) VOP_PUTPAGE(vp, off, len, B_ASYNC, cr, ct); 4424b468a217Seschrock 4425fa9e4066Sahrens return (0); 4426fa9e4066Sahrens } 4427fa9e4066Sahrens 4428fa9e4066Sahrens /* 4429fa9e4066Sahrens * Free or allocate space in a file. Currently, this function only 4430fa9e4066Sahrens * supports the `F_FREESP' command. However, this command is somewhat 4431fa9e4066Sahrens * misnamed, as its functionality includes the ability to allocate as 4432fa9e4066Sahrens * well as free space. 4433fa9e4066Sahrens * 4434fa9e4066Sahrens * IN: vp - vnode of file to free data in. 4435fa9e4066Sahrens * cmd - action to take (only F_FREESP supported). 4436fa9e4066Sahrens * bfp - section of file to free/alloc. 4437fa9e4066Sahrens * flag - current file open mode flags. 4438fa9e4066Sahrens * offset - current file offset. 4439fa9e4066Sahrens * cr - credentials of caller [UNUSED]. 4440da6c28aaSamw * ct - caller context. 4441fa9e4066Sahrens * 4442fa9e4066Sahrens * RETURN: 0 if success 4443fa9e4066Sahrens * error code if failure 4444fa9e4066Sahrens * 4445fa9e4066Sahrens * Timestamps: 4446fa9e4066Sahrens * vp - ctime|mtime updated 4447fa9e4066Sahrens */ 4448fa9e4066Sahrens /* ARGSUSED */ 4449fa9e4066Sahrens static int 4450fa9e4066Sahrens zfs_space(vnode_t *vp, int cmd, flock64_t *bfp, int flag, 4451fa9e4066Sahrens offset_t offset, cred_t *cr, caller_context_t *ct) 4452fa9e4066Sahrens { 4453fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4454fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4455fa9e4066Sahrens uint64_t off, len; 4456fa9e4066Sahrens int error; 4457fa9e4066Sahrens 44583cb34c60Sahrens ZFS_ENTER(zfsvfs); 44593cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4460fa9e4066Sahrens 4461fa9e4066Sahrens if (cmd != F_FREESP) { 4462fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4463fa9e4066Sahrens return (EINVAL); 4464fa9e4066Sahrens } 4465fa9e4066Sahrens 4466fa9e4066Sahrens if (error = convoff(vp, bfp, 0, offset)) { 4467fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4468fa9e4066Sahrens return (error); 4469fa9e4066Sahrens } 4470fa9e4066Sahrens 4471fa9e4066Sahrens if (bfp->l_len < 0) { 4472fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4473fa9e4066Sahrens return (EINVAL); 4474fa9e4066Sahrens } 4475fa9e4066Sahrens 4476fa9e4066Sahrens off = bfp->l_start; 4477104e2ed7Sperrin len = bfp->l_len; /* 0 means from off to end of file */ 4478104e2ed7Sperrin 4479cdb0ab79Smaybee error = zfs_freesp(zp, off, len, flag, TRUE); 4480fa9e4066Sahrens 4481fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4482fa9e4066Sahrens return (error); 4483fa9e4066Sahrens } 4484fa9e4066Sahrens 4485da6c28aaSamw /*ARGSUSED*/ 4486fa9e4066Sahrens static int 4487da6c28aaSamw zfs_fid(vnode_t *vp, fid_t *fidp, caller_context_t *ct) 4488fa9e4066Sahrens { 4489fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4490fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4491f18faf3fSek uint32_t gen; 4492fa9e4066Sahrens uint64_t object = zp->z_id; 4493fa9e4066Sahrens zfid_short_t *zfid; 4494fa9e4066Sahrens int size, i; 4495fa9e4066Sahrens 44963cb34c60Sahrens ZFS_ENTER(zfsvfs); 44973cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4498f18faf3fSek gen = (uint32_t)zp->z_gen; 4499fa9e4066Sahrens 4500fa9e4066Sahrens size = (zfsvfs->z_parent != zfsvfs) ? LONG_FID_LEN : SHORT_FID_LEN; 4501fa9e4066Sahrens if (fidp->fid_len < size) { 4502fa9e4066Sahrens fidp->fid_len = size; 45030f2dc02eSek ZFS_EXIT(zfsvfs); 4504fa9e4066Sahrens return (ENOSPC); 4505fa9e4066Sahrens } 4506fa9e4066Sahrens 4507fa9e4066Sahrens zfid = (zfid_short_t *)fidp; 4508fa9e4066Sahrens 4509fa9e4066Sahrens zfid->zf_len = size; 4510fa9e4066Sahrens 4511fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_object); i++) 4512fa9e4066Sahrens zfid->zf_object[i] = (uint8_t)(object >> (8 * i)); 4513fa9e4066Sahrens 4514fa9e4066Sahrens /* Must have a non-zero generation number to distinguish from .zfs */ 4515fa9e4066Sahrens if (gen == 0) 4516fa9e4066Sahrens gen = 1; 4517fa9e4066Sahrens for (i = 0; i < sizeof (zfid->zf_gen); i++) 4518fa9e4066Sahrens zfid->zf_gen[i] = (uint8_t)(gen >> (8 * i)); 4519fa9e4066Sahrens 4520fa9e4066Sahrens if (size == LONG_FID_LEN) { 4521fa9e4066Sahrens uint64_t objsetid = dmu_objset_id(zfsvfs->z_os); 4522fa9e4066Sahrens zfid_long_t *zlfid; 4523fa9e4066Sahrens 4524fa9e4066Sahrens zlfid = (zfid_long_t *)fidp; 4525fa9e4066Sahrens 4526fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setid); i++) 4527fa9e4066Sahrens zlfid->zf_setid[i] = (uint8_t)(objsetid >> (8 * i)); 4528fa9e4066Sahrens 4529fa9e4066Sahrens /* XXX - this should be the generation number for the objset */ 4530fa9e4066Sahrens for (i = 0; i < sizeof (zlfid->zf_setgen); i++) 4531fa9e4066Sahrens zlfid->zf_setgen[i] = 0; 4532fa9e4066Sahrens } 4533fa9e4066Sahrens 4534fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4535fa9e4066Sahrens return (0); 4536fa9e4066Sahrens } 4537fa9e4066Sahrens 4538fa9e4066Sahrens static int 4539da6c28aaSamw zfs_pathconf(vnode_t *vp, int cmd, ulong_t *valp, cred_t *cr, 4540da6c28aaSamw caller_context_t *ct) 4541fa9e4066Sahrens { 4542fa9e4066Sahrens znode_t *zp, *xzp; 4543fa9e4066Sahrens zfsvfs_t *zfsvfs; 4544fa9e4066Sahrens zfs_dirlock_t *dl; 4545fa9e4066Sahrens int error; 4546fa9e4066Sahrens 4547fa9e4066Sahrens switch (cmd) { 4548fa9e4066Sahrens case _PC_LINK_MAX: 4549fa9e4066Sahrens *valp = ULONG_MAX; 4550fa9e4066Sahrens return (0); 4551fa9e4066Sahrens 4552fa9e4066Sahrens case _PC_FILESIZEBITS: 4553fa9e4066Sahrens *valp = 64; 4554fa9e4066Sahrens return (0); 4555fa9e4066Sahrens 4556fa9e4066Sahrens case _PC_XATTR_EXISTS: 4557fa9e4066Sahrens zp = VTOZ(vp); 4558fa9e4066Sahrens zfsvfs = zp->z_zfsvfs; 45593cb34c60Sahrens ZFS_ENTER(zfsvfs); 45603cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4561fa9e4066Sahrens *valp = 0; 4562fa9e4066Sahrens error = zfs_dirent_lock(&dl, zp, "", &xzp, 4563da6c28aaSamw ZXATTR | ZEXISTS | ZSHARED, NULL, NULL); 4564fa9e4066Sahrens if (error == 0) { 4565fa9e4066Sahrens zfs_dirent_unlock(dl); 4566fa9e4066Sahrens if (!zfs_dirempty(xzp)) 4567fa9e4066Sahrens *valp = 1; 4568fa9e4066Sahrens VN_RELE(ZTOV(xzp)); 4569fa9e4066Sahrens } else if (error == ENOENT) { 4570fa9e4066Sahrens /* 4571fa9e4066Sahrens * If there aren't extended attributes, it's the 4572fa9e4066Sahrens * same as having zero of them. 4573fa9e4066Sahrens */ 4574fa9e4066Sahrens error = 0; 4575fa9e4066Sahrens } 4576fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4577fa9e4066Sahrens return (error); 4578fa9e4066Sahrens 4579da6c28aaSamw case _PC_SATTR_ENABLED: 4580da6c28aaSamw case _PC_SATTR_EXISTS: 45819660e5cbSJanice Chang *valp = vfs_has_feature(vp->v_vfsp, VFSFT_SYSATTR_VIEWS) && 4582da6c28aaSamw (vp->v_type == VREG || vp->v_type == VDIR); 4583da6c28aaSamw return (0); 4584da6c28aaSamw 4585e802abbdSTim Haley case _PC_ACCESS_FILTERING: 4586e802abbdSTim Haley *valp = vfs_has_feature(vp->v_vfsp, VFSFT_ACCESS_FILTER) && 4587e802abbdSTim Haley vp->v_type == VDIR; 4588e802abbdSTim Haley return (0); 4589e802abbdSTim Haley 4590fa9e4066Sahrens case _PC_ACL_ENABLED: 4591fa9e4066Sahrens *valp = _ACL_ACE_ENABLED; 4592fa9e4066Sahrens return (0); 4593fa9e4066Sahrens 4594fa9e4066Sahrens case _PC_MIN_HOLE_SIZE: 4595fa9e4066Sahrens *valp = (ulong_t)SPA_MINBLOCKSIZE; 4596fa9e4066Sahrens return (0); 4597fa9e4066Sahrens 45983b862e9aSRoger A. Faulkner case _PC_TIMESTAMP_RESOLUTION: 45993b862e9aSRoger A. Faulkner /* nanosecond timestamp resolution */ 46003b862e9aSRoger A. Faulkner *valp = 1L; 46013b862e9aSRoger A. Faulkner return (0); 46023b862e9aSRoger A. Faulkner 4603fa9e4066Sahrens default: 4604da6c28aaSamw return (fs_pathconf(vp, cmd, valp, cr, ct)); 4605fa9e4066Sahrens } 4606fa9e4066Sahrens } 4607fa9e4066Sahrens 4608fa9e4066Sahrens /*ARGSUSED*/ 4609fa9e4066Sahrens static int 4610da6c28aaSamw zfs_getsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4611da6c28aaSamw caller_context_t *ct) 4612fa9e4066Sahrens { 4613fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4614fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4615fa9e4066Sahrens int error; 4616da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4617fa9e4066Sahrens 46183cb34c60Sahrens ZFS_ENTER(zfsvfs); 46193cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4620da6c28aaSamw error = zfs_getacl(zp, vsecp, skipaclchk, cr); 4621fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4622fa9e4066Sahrens 4623fa9e4066Sahrens return (error); 4624fa9e4066Sahrens } 4625fa9e4066Sahrens 4626fa9e4066Sahrens /*ARGSUSED*/ 4627fa9e4066Sahrens static int 4628da6c28aaSamw zfs_setsecattr(vnode_t *vp, vsecattr_t *vsecp, int flag, cred_t *cr, 4629da6c28aaSamw caller_context_t *ct) 4630fa9e4066Sahrens { 4631fa9e4066Sahrens znode_t *zp = VTOZ(vp); 4632fa9e4066Sahrens zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4633fa9e4066Sahrens int error; 4634da6c28aaSamw boolean_t skipaclchk = (flag & ATTR_NOACLCHECK) ? B_TRUE : B_FALSE; 4635fa9e4066Sahrens 46363cb34c60Sahrens ZFS_ENTER(zfsvfs); 46373cb34c60Sahrens ZFS_VERIFY_ZP(zp); 4638da6c28aaSamw error = zfs_setacl(zp, vsecp, skipaclchk, cr); 4639fa9e4066Sahrens ZFS_EXIT(zfsvfs); 4640fa9e4066Sahrens return (error); 4641fa9e4066Sahrens } 4642fa9e4066Sahrens 4643*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4644*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Tunable, both must be a power of 2. 4645*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * 4646*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * zcr_blksz_min: the smallest read we may consider to loan out an arcbuf 4647*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * zcr_blksz_max: if set to less than the file block size, allow loaning out of 4648*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * an arcbuf for a partial block read 4649*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4650*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int zcr_blksz_min = (1 << 10); /* 1K */ 4651*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int zcr_blksz_max = (1 << 17); /* 128K */ 4652*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4653*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /*ARGSUSED*/ 4654*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static int 4655*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfs_reqzcbuf(vnode_t *vp, enum uio_rw ioflag, xuio_t *xuio, cred_t *cr, 4656*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States caller_context_t *ct) 4657*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 4658*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States znode_t *zp = VTOZ(vp); 4659*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfsvfs_t *zfsvfs = zp->z_zfsvfs; 4660*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int max_blksz = zfsvfs->z_max_blksz; 4661*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio_t *uio = &xuio->xu_uio; 4662*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ssize_t size = uio->uio_resid; 4663*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States offset_t offset = uio->uio_loffset; 4664*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int blksz; 4665*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int fullblk, i; 4666*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf; 4667*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ssize_t maxsize; 4668*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int preamble, postamble; 4669*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4670*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (xuio->xu_type != UIOTYPE_ZEROCOPY) 4671*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (EINVAL); 4672*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4673*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_ENTER(zfsvfs); 4674*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_VERIFY_ZP(zp); 4675*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States switch (ioflag) { 4676*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States case UIO_WRITE: 4677*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4678*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Loan out an arc_buf for write if write size is bigger than 4679*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * max_blksz, and the file's block size is also max_blksz. 4680*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4681*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = max_blksz; 4682*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size < blksz || zp->z_blksz != blksz) { 4683*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 4684*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (EINVAL); 4685*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4686*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4687*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Caller requests buffers for write before knowing where the 4688*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * write offset might be (e.g. NFS TCP write). 4689*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4690*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (offset == -1) { 4691*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = 0; 4692*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } else { 4693*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = P2PHASE(offset, blksz); 4694*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (preamble) { 4695*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States preamble = blksz - preamble; 4696*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size -= preamble; 4697*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4698*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4699*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4700*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States postamble = P2PHASE(size, blksz); 4701*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size -= postamble; 4702*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4703*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States fullblk = size / blksz; 4704*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_init(xuio, 4705*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (preamble != 0) + fullblk + (postamble != 0)); 4706*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States DTRACE_PROBE3(zfs_reqzcbuf_align, int, preamble, 4707*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int, postamble, int, 4708*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States (preamble != 0) + fullblk + (postamble != 0)); 4709*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4710*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4711*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Have to fix iov base/len for partial buffers. They 4712*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * currently represent full arc_buf's. 4713*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4714*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (preamble) { 4715*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* data begins in the middle of the arc_buf */ 4716*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_request_arcbuf(zp->z_dbuf, blksz); 4717*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 4718*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio, abuf, blksz - preamble, preamble); 4719*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4720*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4721*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States for (i = 0; i < fullblk; i++) { 4722*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_request_arcbuf(zp->z_dbuf, blksz); 4723*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 4724*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio, abuf, 0, blksz); 4725*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4726*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4727*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (postamble) { 4728*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* data ends in the middle of the arc_buf */ 4729*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_request_arcbuf(zp->z_dbuf, blksz); 4730*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf); 4731*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_add(xuio, abuf, 0, postamble); 4732*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4733*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States break; 4734*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States case UIO_READ: 4735*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4736*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * Loan out an arc_buf for read if the read size is larger than 4737*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * the current file block size. Block alignment is not 4738*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * considered. Partial arc_buf will be loaned out for read. 4739*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4740*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zp->z_blksz; 4741*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz < zcr_blksz_min) 4742*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zcr_blksz_min; 4743*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz > zcr_blksz_max) 4744*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States blksz = zcr_blksz_max; 4745*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* avoid potential complexity of dealing with it */ 4746*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (blksz > max_blksz) { 4747*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 4748*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (EINVAL); 4749*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4750*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4751*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States maxsize = zp->z_phys->zp_size - uio->uio_loffset; 4752*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size > maxsize) 4753*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States size = maxsize; 4754*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4755*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (size < blksz || vn_has_cached_data(vp)) { 4756*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 4757*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (EINVAL); 4758*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4759*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States break; 4760*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States default: 4761*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 4762*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (EINVAL); 4763*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4764*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4765*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States uio->uio_extflg = UIO_XUIO; 4766*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States XUIO_XUZC_RW(xuio) = ioflag; 4767*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ZFS_EXIT(zfsvfs); 4768*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 4769*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4770*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4771*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /*ARGSUSED*/ 4772*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States static int 4773*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States zfs_retzcbuf(vnode_t *vp, xuio_t *xuio, cred_t *cr, caller_context_t *ct) 4774*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States { 4775*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int i; 4776*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States arc_buf_t *abuf; 4777*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States int ioflag = XUIO_XUZC_RW(xuio); 4778*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4779*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(xuio->xu_type == UIOTYPE_ZEROCOPY); 4780*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4781*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States i = dmu_xuio_cnt(xuio); 4782*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States while (i-- > 0) { 4783*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States abuf = dmu_xuio_arcbuf(xuio, i); 4784*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States /* 4785*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * if abuf == NULL, it must be a write buffer 4786*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States * that has been returned in zfs_write(). 4787*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States */ 4788*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States if (abuf) 4789*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_return_arcbuf(abuf); 4790*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States ASSERT(abuf || ioflag == UIO_WRITE); 4791*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4792*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4793*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States dmu_xuio_fini(xuio); 4794*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States return (0); 4795*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States } 4796*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States 4797fa9e4066Sahrens /* 4798fa9e4066Sahrens * Predeclare these here so that the compiler assumes that 4799fa9e4066Sahrens * this is an "old style" function declaration that does 4800fa9e4066Sahrens * not include arguments => we won't get type mismatch errors 4801fa9e4066Sahrens * in the initializations that follow. 4802fa9e4066Sahrens */ 4803fa9e4066Sahrens static int zfs_inval(); 4804fa9e4066Sahrens static int zfs_isdir(); 4805fa9e4066Sahrens 4806fa9e4066Sahrens static int 4807fa9e4066Sahrens zfs_inval() 4808fa9e4066Sahrens { 4809fa9e4066Sahrens return (EINVAL); 4810fa9e4066Sahrens } 4811fa9e4066Sahrens 4812fa9e4066Sahrens static int 4813fa9e4066Sahrens zfs_isdir() 4814fa9e4066Sahrens { 4815fa9e4066Sahrens return (EISDIR); 4816fa9e4066Sahrens } 4817fa9e4066Sahrens /* 4818fa9e4066Sahrens * Directory vnode operations template 4819fa9e4066Sahrens */ 4820fa9e4066Sahrens vnodeops_t *zfs_dvnodeops; 4821fa9e4066Sahrens const fs_operation_def_t zfs_dvnodeops_template[] = { 4822aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4823aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4824aa59c4cbSrsb VOPNAME_READ, { .error = zfs_isdir }, 4825aa59c4cbSrsb VOPNAME_WRITE, { .error = zfs_isdir }, 4826aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4827aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4828aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4829aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4830aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4831aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4832aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4833aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4834aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4835aa59c4cbSrsb VOPNAME_MKDIR, { .vop_mkdir = zfs_mkdir }, 4836aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4837aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4838aa59c4cbSrsb VOPNAME_SYMLINK, { .vop_symlink = zfs_symlink }, 4839aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4840aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4841aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4842aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4843aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4844aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4845aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4846df2381bfSpraks VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4847aa59c4cbSrsb NULL, NULL 4848fa9e4066Sahrens }; 4849fa9e4066Sahrens 4850fa9e4066Sahrens /* 4851fa9e4066Sahrens * Regular file vnode operations template 4852fa9e4066Sahrens */ 4853fa9e4066Sahrens vnodeops_t *zfs_fvnodeops; 4854fa9e4066Sahrens const fs_operation_def_t zfs_fvnodeops_template[] = { 4855aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4856aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4857aa59c4cbSrsb VOPNAME_READ, { .vop_read = zfs_read }, 4858aa59c4cbSrsb VOPNAME_WRITE, { .vop_write = zfs_write }, 4859aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4860aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4861aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4862aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4863aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4864aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4865aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4866aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4867aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4868aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4869aa59c4cbSrsb VOPNAME_FRLOCK, { .vop_frlock = zfs_frlock }, 4870aa59c4cbSrsb VOPNAME_SPACE, { .vop_space = zfs_space }, 4871aa59c4cbSrsb VOPNAME_GETPAGE, { .vop_getpage = zfs_getpage }, 4872aa59c4cbSrsb VOPNAME_PUTPAGE, { .vop_putpage = zfs_putpage }, 4873aa59c4cbSrsb VOPNAME_MAP, { .vop_map = zfs_map }, 4874aa59c4cbSrsb VOPNAME_ADDMAP, { .vop_addmap = zfs_addmap }, 4875aa59c4cbSrsb VOPNAME_DELMAP, { .vop_delmap = zfs_delmap }, 4876aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4877aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4878aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4879aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4880*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States VOPNAME_REQZCBUF, { .vop_reqzcbuf = zfs_reqzcbuf }, 4881*c242f9a0Schunli zhang - Sun Microsystems - Irvine United States VOPNAME_RETZCBUF, { .vop_retzcbuf = zfs_retzcbuf }, 4882aa59c4cbSrsb NULL, NULL 4883fa9e4066Sahrens }; 4884fa9e4066Sahrens 4885fa9e4066Sahrens /* 4886fa9e4066Sahrens * Symbolic link vnode operations template 4887fa9e4066Sahrens */ 4888fa9e4066Sahrens vnodeops_t *zfs_symvnodeops; 4889fa9e4066Sahrens const fs_operation_def_t zfs_symvnodeops_template[] = { 4890aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4891aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4892aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4893aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4894aa59c4cbSrsb VOPNAME_READLINK, { .vop_readlink = zfs_readlink }, 4895aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4896aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4897aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4898aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4899aa59c4cbSrsb NULL, NULL 4900fa9e4066Sahrens }; 4901fa9e4066Sahrens 4902743a77edSAlan Wright /* 4903743a77edSAlan Wright * special share hidden files vnode operations template 4904743a77edSAlan Wright */ 4905743a77edSAlan Wright vnodeops_t *zfs_sharevnodeops; 4906743a77edSAlan Wright const fs_operation_def_t zfs_sharevnodeops_template[] = { 4907743a77edSAlan Wright VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4908743a77edSAlan Wright VOPNAME_ACCESS, { .vop_access = zfs_access }, 4909743a77edSAlan Wright VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4910743a77edSAlan Wright VOPNAME_FID, { .vop_fid = zfs_fid }, 4911743a77edSAlan Wright VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4912743a77edSAlan Wright VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4913743a77edSAlan Wright VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4914743a77edSAlan Wright VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4915743a77edSAlan Wright NULL, NULL 4916743a77edSAlan Wright }; 4917743a77edSAlan Wright 4918fa9e4066Sahrens /* 4919fa9e4066Sahrens * Extended attribute directory vnode operations template 4920fa9e4066Sahrens * This template is identical to the directory vnodes 4921fa9e4066Sahrens * operation template except for restricted operations: 4922fa9e4066Sahrens * VOP_MKDIR() 4923fa9e4066Sahrens * VOP_SYMLINK() 4924fa9e4066Sahrens * Note that there are other restrictions embedded in: 4925fa9e4066Sahrens * zfs_create() - restrict type to VREG 4926fa9e4066Sahrens * zfs_link() - no links into/out of attribute space 4927fa9e4066Sahrens * zfs_rename() - no moves into/out of attribute space 4928fa9e4066Sahrens */ 4929fa9e4066Sahrens vnodeops_t *zfs_xdvnodeops; 4930fa9e4066Sahrens const fs_operation_def_t zfs_xdvnodeops_template[] = { 4931aa59c4cbSrsb VOPNAME_OPEN, { .vop_open = zfs_open }, 4932aa59c4cbSrsb VOPNAME_CLOSE, { .vop_close = zfs_close }, 4933aa59c4cbSrsb VOPNAME_IOCTL, { .vop_ioctl = zfs_ioctl }, 4934aa59c4cbSrsb VOPNAME_GETATTR, { .vop_getattr = zfs_getattr }, 4935aa59c4cbSrsb VOPNAME_SETATTR, { .vop_setattr = zfs_setattr }, 4936aa59c4cbSrsb VOPNAME_ACCESS, { .vop_access = zfs_access }, 4937aa59c4cbSrsb VOPNAME_LOOKUP, { .vop_lookup = zfs_lookup }, 4938aa59c4cbSrsb VOPNAME_CREATE, { .vop_create = zfs_create }, 4939aa59c4cbSrsb VOPNAME_REMOVE, { .vop_remove = zfs_remove }, 4940aa59c4cbSrsb VOPNAME_LINK, { .vop_link = zfs_link }, 4941aa59c4cbSrsb VOPNAME_RENAME, { .vop_rename = zfs_rename }, 4942aa59c4cbSrsb VOPNAME_MKDIR, { .error = zfs_inval }, 4943aa59c4cbSrsb VOPNAME_RMDIR, { .vop_rmdir = zfs_rmdir }, 4944aa59c4cbSrsb VOPNAME_READDIR, { .vop_readdir = zfs_readdir }, 4945aa59c4cbSrsb VOPNAME_SYMLINK, { .error = zfs_inval }, 4946aa59c4cbSrsb VOPNAME_FSYNC, { .vop_fsync = zfs_fsync }, 4947aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4948aa59c4cbSrsb VOPNAME_FID, { .vop_fid = zfs_fid }, 4949aa59c4cbSrsb VOPNAME_SEEK, { .vop_seek = zfs_seek }, 4950aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4951aa59c4cbSrsb VOPNAME_GETSECATTR, { .vop_getsecattr = zfs_getsecattr }, 4952aa59c4cbSrsb VOPNAME_SETSECATTR, { .vop_setsecattr = zfs_setsecattr }, 4953aa59c4cbSrsb VOPNAME_VNEVENT, { .vop_vnevent = fs_vnevent_support }, 4954aa59c4cbSrsb NULL, NULL 4955fa9e4066Sahrens }; 4956fa9e4066Sahrens 4957fa9e4066Sahrens /* 4958fa9e4066Sahrens * Error vnode operations template 4959fa9e4066Sahrens */ 4960fa9e4066Sahrens vnodeops_t *zfs_evnodeops; 4961fa9e4066Sahrens const fs_operation_def_t zfs_evnodeops_template[] = { 4962aa59c4cbSrsb VOPNAME_INACTIVE, { .vop_inactive = zfs_inactive }, 4963aa59c4cbSrsb VOPNAME_PATHCONF, { .vop_pathconf = zfs_pathconf }, 4964aa59c4cbSrsb NULL, NULL 4965fa9e4066Sahrens }; 4966